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0001 # Copyright (C) licensed under the  <a href="https://spdx.org/licenses/GFDL-1.2-or-later.html">licensed under the terms of the GNU Free Documentation License 1.2+</a> unless stated otherwise
0002 # This file is distributed under the same license as the Digikam Manual package.
0003 # Tommi Nieminen <translator@legisign.org>, 2023.
0004 #
0005 msgid ""
0006 msgstr ""
0007 "Project-Id-Version: Digikam Manual 8.0.0\n"
0008 "Report-Msgid-Bugs-To: \n"
0009 "POT-Creation-Date: 2023-12-30 00:35+0000\n"
0010 "PO-Revision-Date: 2023-04-14 18:38+0300\n"
0011 "Last-Translator: Tommi Nieminen <translator@legisign.org>\n"
0012 "Language-Team: Finnish <kde-i18n-doc@kde.org>\n"
0013 "Language: fi\n"
0014 "MIME-Version: 1.0\n"
0015 "Content-Type: text/plain; charset=UTF-8\n"
0016 "Content-Transfer-Encoding: 8bit\n"
0017 "Plural-Forms: nplurals=2; plural=(n != 1);\n"
0018 "X-Generator: Lokalize 22.12.3\n"
0019 
0020 #: ../../asset_management/data_protection.rst:1
0021 msgid "Protect Your Images from Data Corruption and Loss"
0022 msgstr "Turvaa kuvasi tiedon vioittumiselta ja tietohävikiltä"
0023 
0024 #: ../../asset_management/data_protection.rst:1
0025 msgid ""
0026 "digiKam, documentation, user manual, photo management, open source, free, "
0027 "learn, easy, disk errors, disk failures, power surges, ECC, transmission "
0028 "errors, storage media deterioration, recovery, redundancy, disaster "
0029 "prevention, lifetime, temperature, data size, common myths, metadata, IPTC "
0030 "stored in image files, XMP files associated, keep the originals, storage, "
0031 "scalability, media, retrieval of images and metadata, copying image data "
0032 "over to the next generation of media, applications, operating systems, "
0033 "virtualization, viewing device, use of the www, ZFS, BTRFS"
0034 msgstr ""
0035 
0036 #: ../../asset_management/data_protection.rst:14
0037 msgid "Data Corruption and Loss"
0038 msgstr "Tieto vioittuminen ja hävikki"
0039 
0040 #: ../../asset_management/data_protection.rst:16
0041 msgid "Contents"
0042 msgstr "Sisältö"
0043 
0044 #: ../../asset_management/data_protection.rst:19
0045 msgid "Main Factors of Digital Data Loss"
0046 msgstr "Digitaalisen tietohävikin päätekijät"
0047 
0048 #: ../../asset_management/data_protection.rst:21
0049 msgid ""
0050 "Of course we're not talking about losing Blue-rays on the road or in a fire "
0051 "- that kind of loss is just the same as traditional paper copies or "
0052 "negatives. We are talking about problems with the so called *New Media*."
0053 msgstr ""
0054 
0055 #: ../../asset_management/data_protection.rst:23
0056 msgid ""
0057 "Problems with digital data can roughly be categorized into the following "
0058 "areas of concern:"
0059 msgstr ""
0060 "Digitaalisen tiedon ongelmat voi karkeasti jaotella seuraaviin "
0061 "huolenaiheisiin:"
0062 
0063 #: ../../asset_management/data_protection.rst:25
0064 msgid ""
0065 "The physical deterioration of the media (all media deteriorate at different "
0066 "time scales)."
0067 msgstr ""
0068 "Tietovälineen fyysinen heikkeneminen (kaikki tietovälineet heikkenevät oman "
0069 "aikataulunsa mukaan)."
0070 
0071 #: ../../asset_management/data_protection.rst:27
0072 msgid "Undetected transmission errors during data transfer."
0073 msgstr "Havaitsematta jääneet siirron aikaiset virheet."
0074 
0075 #: ../../asset_management/data_protection.rst:29
0076 msgid ""
0077 "The lack of support for long-date, undoubtedly proprietary, digital formats."
0078 msgstr "Vanhojen ja luultavasti suljettujen tietomuotojen tuen puute."
0079 
0080 #: ../../asset_management/data_protection.rst:31
0081 msgid "Ancient hardware."
0082 msgstr "Muinainen laitteisto."
0083 
0084 #: ../../asset_management/data_protection.rst:33
0085 msgid ""
0086 "Kroll Ontrack, the worlds largest data recovery firm, have some interesting "
0087 "statistics on what actually causes data loss."
0088 msgstr ""
0089 "Kroll Ontrackillä, maailman suurimmalla tiedonpelastusyrityksellä, tarjoaa "
0090 "kiinnostavaa tilastoa tietohävikin todellisista syistä."
0091 
0092 #: ../../asset_management/data_protection.rst:36
0093 msgid "Cause of data loss"
0094 msgstr "Tietohävikin syy"
0095 
0096 #: ../../asset_management/data_protection.rst:36
0097 msgid "Perception"
0098 msgstr "Havainto"
0099 
0100 #: ../../asset_management/data_protection.rst:36
0101 msgid "Reality"
0102 msgstr "Todellisuus"
0103 
0104 #: ../../asset_management/data_protection.rst:38
0105 msgid "Hardware or system problem"
0106 msgstr "Laitteisto- tai järjestelmäongelma"
0107 
0108 #: ../../asset_management/data_protection.rst:38
0109 msgid "78%"
0110 msgstr "78 %"
0111 
0112 #: ../../asset_management/data_protection.rst:38
0113 msgid "56%"
0114 msgstr "56 %"
0115 
0116 #: ../../asset_management/data_protection.rst:39
0117 msgid "Human error"
0118 msgstr "Inhimillinen erhe"
0119 
0120 #: ../../asset_management/data_protection.rst:39
0121 msgid "11%"
0122 msgstr "11 %"
0123 
0124 #: ../../asset_management/data_protection.rst:39
0125 msgid "26%"
0126 msgstr "26 %"
0127 
0128 #: ../../asset_management/data_protection.rst:40
0129 msgid "Software corruption or problem"
0130 msgstr "Ohjelman vioittuminen tai ohjelmisto-ongelma"
0131 
0132 #: ../../asset_management/data_protection.rst:40
0133 msgid "7%"
0134 msgstr "7 %"
0135 
0136 #: ../../asset_management/data_protection.rst:40
0137 msgid "9%"
0138 msgstr "9 %"
0139 
0140 #: ../../asset_management/data_protection.rst:41
0141 msgid "Computer viruses"
0142 msgstr "Tietokonevirukset"
0143 
0144 #: ../../asset_management/data_protection.rst:41
0145 msgid "2%"
0146 msgstr "2 %"
0147 
0148 #: ../../asset_management/data_protection.rst:41
0149 msgid "4%"
0150 msgstr "4 %"
0151 
0152 #: ../../asset_management/data_protection.rst:42
0153 msgid "Disaster"
0154 msgstr "Onnettomuus"
0155 
0156 #: ../../asset_management/data_protection.rst:42
0157 msgid "1-2%"
0158 msgstr "1–2 %"
0159 
0160 #: ../../asset_management/data_protection.rst:45
0161 msgid "So let us analyze those cases step by step."
0162 msgstr "Analysoidaan tapauksia vaihe vaiheelta."
0163 
0164 #: ../../asset_management/data_protection.rst:50
0165 msgid "Storage Deterioration"
0166 msgstr "Talletustilan heikkeneminen"
0167 
0168 #: ../../asset_management/data_protection.rst:52
0169 msgid ""
0170 "Devices listed below are sorted by data speed access feature, from the less "
0171 "faster to the most faster."
0172 msgstr ""
0173 "Alla on lueteltu laitteita tiedonsiirron nopeuden mukaan hitaimmasta "
0174 "nopeimpaan."
0175 
0176 #: ../../asset_management/data_protection.rst:55
0177 msgid "Magnetic Media"
0178 msgstr "Magneettinen tietoväline"
0179 
0180 #: ../../asset_management/data_protection.rst:57
0181 msgid ""
0182 "Magnetic tapes are used in backup systems, much more in professional "
0183 "environments than in home use. Tapes have issues with data retention and "
0184 "changing technology, but they are safer in one aspect than optical drives: "
0185 "they are less exposed to scratches and dirt and writing deficiencies. On the "
0186 "other hand they are susceptible to magnetic fields. Throw a magnet next to a "
0187 "tape and it's gone. Tapes should be re-copied every 5-8 years, otherwise too "
0188 "many bits will fail and escape the checksum protection. The downside of "
0189 "magnetic tapes is often the recorder price and the restore time (20x longer "
0190 "than from HDD). Tape backup system have seen their best days."
0191 msgstr ""
0192 
0193 #: ../../asset_management/data_protection.rst:60
0194 msgid "Optical Drives"
0195 msgstr "Optiset levyt"
0196 
0197 #: ../../asset_management/data_protection.rst:62
0198 msgid ""
0199 "Physical deterioration of the media happens more rapidly with paper and CD-"
0200 "Rs than the average of film. Yet while film lasts longer (sometimes decades "
0201 "longer) than other forms of media, the right kind of backup of digital media "
0202 "never loses anything. Film decays - digital 1's and 0's do not, and film "
0203 "starts to decay the moment it's created and developed. It will never have "
0204 "the same color, contrast, etc. that it did have a moment before. Digital "
0205 "doesn't do that. However, digital is susceptible to corruption. And yes, "
0206 "physical media such as floppies and magnetic hard drives are also "
0207 "susceptible to the decay of the medium, just like CDs are. They just last "
0208 "longer."
0209 msgstr ""
0210 
0211 #: ../../asset_management/data_protection.rst:64
0212 msgid ""
0213 "To combat the problem of optical drives, they need to be properly cared for "
0214 "and not trusted for more than a few years. Thankfully you can purchase "
0215 "archive-quality CDs and DVDs which last longer, though they are much more "
0216 "difficult to obtain and are much more expensive. There are offers out there "
0217 "for gold-plated optical drive, few euros a piece claiming 100 years storage "
0218 "life (if you care to believe it)."
0219 msgstr ""
0220 
0221 #: ../../asset_management/data_protection.rst:66
0222 msgid ""
0223 "Optical disks may become unreadable, but you can reduce the risk using good "
0224 "disks and a good recorder, and storing them in a correct way. The best "
0225 "optical drive recorders are not much more expensive than the cheapest, but "
0226 "they write in a much more reliable way. It's a matter of choosing the right "
0227 "one."
0228 msgstr ""
0229 
0230 #: ../../asset_management/data_protection.rst:68
0231 msgid ""
0232 "Essentially, optical drives are very prone to errors, even in a freshly "
0233 "written state. That's why they are heavily protected with a checksum "
0234 "mechanism (75% of data are effective data, the rest is formatting and "
0235 "checksum overhead). But even with that massive amount of protection they "
0236 "will suffer deterioration from chemical aging, ultra-violet exposure, "
0237 "scratches, dust, etc."
0238 msgstr ""
0239 
0240 #: ../../asset_management/data_protection.rst:70
0241 msgid ""
0242 "For damaged optical drives, Wikipedia `list all common applications <https://"
0243 "en.wikipedia.org/wiki/Data_recovery#List_of_data_recovery_software>`_ "
0244 "designed to get data from damaged floppies, hard drives, flash media such as "
0245 "camera memory and USB drives, and so forth."
0246 msgstr ""
0247 
0248 #: ../../asset_management/data_protection.rst:72
0249 msgid ""
0250 "Dual-layer optical media Blu-ray disk can store 50 GB, almost six times the "
0251 "capacity of a dual layer DVD at 8.5 GB. Everything that has been said about "
0252 "CDs/DVDs applies to Blu-ray disks as well."
0253 msgstr ""
0254 
0255 #: ../../asset_management/data_protection.rst:74
0256 msgid ""
0257 "Best practice: burn them slowly with a good recorder on archive quality "
0258 "media in an open, non-proprietary format, read the data back to verify, "
0259 "label them with some descriptive text + date & author, lock them away where "
0260 "it is clean, dark, animal safe and dry. And do not forget to copy them over "
0261 "to the next generation of media before you throw away your last piece of "
0262 "hardware or software able to read them."
0263 msgstr ""
0264 
0265 #: ../../asset_management/data_protection.rst:77
0266 msgid "Hard Disks"
0267 msgstr "Mekaaniset kiintolevyt"
0268 
0269 #: ../../asset_management/data_protection.rst:79
0270 msgid ""
0271 "Hard Disk (HDD) manufacturers keep their statistics to themselves. A "
0272 "manufacturer guaranty buys you a new disk, but no data. Google for One has "
0273 "done a large scale study on `HDD <https://en.wikipedia.org/wiki/"
0274 "Hard_disk_drive>`_ failure mechanisms: `Disk Failures study <https://"
0275 "research.google.com/archive/disk_failures.pdf>`_."
0276 msgstr ""
0277 "Mekaanisten kiintolevyjen (HDD) valmistajat pitävät omia tilastoja. "
0278 "Valmistajan takuulla saa uuden levyn, mutta ei tietojasi. Google on tehnyt "
0279 "yhden suuren mittakuvan tutkimuksen `Kiintolevyjen <https://https://fi."
0280 "wikipedia.org/wiki/Kiintolevy>`_ virhemekanismeista: `Disk Failures study "
0281 "<https://research.google.com/archive/disk_failures.pdf>`_."
0282 
0283 #: ../../asset_management/data_protection.rst:81
0284 msgid ""
0285 "In a nutshell: Disks run longest when operating between 35°C and 45°C, at "
0286 "lower temperatures the error rates increases dramatically. Controller parts "
0287 "(electronics) are the foremost sources of failure, SMART does not diagnose "
0288 "any of this. Some `SMART <https://en.wikipedia.org/wiki/Self-Monitoring,"
0289 "_Analysis_and_Reporting_Technology>`_ errors are indicative of imminent "
0290 "failure, in particular scan errors and relocation counts. Lifetime "
0291 "expectancy is 4-5 years."
0292 msgstr ""
0293 
0294 #: ../../asset_management/data_protection.rst:83
0295 msgid ""
0296 "In general and contrary to intuition or ecological considerations, running a "
0297 "hard drive permanently results in a longer lifetime than switching it on and "
0298 "off all the time. It has even been reported that aggressive power management "
0299 "spinning down the drive can harm it quickly. Making it working hard shortens "
0300 "the lifetime somewhat. The worst factors for HDD probably are vibrations, "
0301 "shocks, and cold temperatures."
0302 msgstr ""
0303 
0304 #: ../../asset_management/data_protection.rst:85
0305 msgid ""
0306 "If your disk is making weird noises, normal file recovery software isn’t "
0307 "going to work. Do a quick backup if that is going to happen to you. (Use dd "
0308 "utility if possible, not a normal file backup since dd reads in a smooth, "
0309 "spiraling stream from beginning to end and doesn't stress the mechanics). "
0310 "There are specialist companies that can recover data from otherwise "
0311 "destroyed drive, but they are very expensive."
0312 msgstr ""
0313 
0314 #: ../../asset_management/data_protection.rst:87
0315 msgid ""
0316 "Linux `SmartMonTools <https://en.wikipedia.org/wiki/Smartmontools>`_ suite "
0317 "allows to query the storage hardware devices for future failure. We highly "
0318 "recommend to use this kind of tool on your computer."
0319 msgstr ""
0320 
0321 #: ../../asset_management/data_protection.rst:90
0322 msgid "Solid State Drives"
0323 msgstr "SSD-kiintolevyt"
0324 
0325 #: ../../asset_management/data_protection.rst:92
0326 msgid ""
0327 "`SSDs <https://en.wikipedia.org/wiki/Solid-state_drive>`_ are mechanically "
0328 "more robust than HDDs and suffer much less on that front when they are "
0329 "plugged into the computer. They will replace HDD in time as capacity, "
0330 "robustest, and price become more and more a good solution as permanent data "
0331 "storage devices."
0332 msgstr ""
0333 
0334 #: ../../asset_management/data_protection.rst:94
0335 msgid ""
0336 "In case of use as external device, one major cause for data loss (often "
0337 "recoverable) is the unsafe removal of SSDs from a computer. Before data is "
0338 "saved from a computer memory to any attached device, it remains for some "
0339 "time in buffers. In hard drives this means seconds at most, whereas with "
0340 "SSDs it can be tens of minutes. Therefore, before you disconnect a flash "
0341 "device, always activate data flushing through software (often called *safely "
0342 "remove device*)."
0343 msgstr ""
0344 
0345 #: ../../asset_management/data_protection.rst:97
0346 msgid "Non-Volatile Memory"
0347 msgstr "NVMe-kiintolevyt"
0348 
0349 #: ../../asset_management/data_protection.rst:99
0350 msgid ""
0351 "`NVM Express (NVMe) <https://en.wikipedia.org/wiki/NVMe>`_ for Non-Volatile "
0352 "Memory is a logical-device interface for accessing a computer's non-volatile "
0353 "storage media attached PCI Express (PCIe) bus. It use same very fast NAND "
0354 "flash memory used in SSDs, but use the M.2 cards interface instead the "
0355 "slower mSATA used with older HDDs."
0356 msgstr ""
0357 
0358 #: ../../asset_management/data_protection.rst:101
0359 msgid ""
0360 "NVMe allows host hardware and software to fully exploit the levels of "
0361 "parallelism possible in modern SSDs. NVMe reduces I/O overhead and brings "
0362 "various performance improvements relative to previous SSDs. mSATA interface "
0363 "protocols were developed for use with far slower HDDs where a very lengthy "
0364 "delay exists between a request and data transfer, where data speeds are much "
0365 "slower than RAM speeds."
0366 msgstr ""
0367 
0368 #: ../../asset_management/data_protection.rst:103
0369 msgid ""
0370 "For a viability viewpoint, as NVMe devices uses the same hardware than SSDs "
0371 "to store data, the robustness must be the same."
0372 msgstr ""
0373 
0374 #: ../../asset_management/data_protection.rst:107
0375 msgid ""
0376 "**In all cases SSDs or NVMe as internal devices are the more modern and "
0377 "efficient solution to host the digiKam databases and the collections.**"
0378 msgstr ""
0379 
0380 #: ../../asset_management/data_protection.rst:110
0381 msgid "Power Supply Failures"
0382 msgstr "Virtalähdeviat"
0383 
0384 #: ../../asset_management/data_protection.rst:113
0385 msgid "Power Surges"
0386 msgstr "Virtapiikit"
0387 
0388 #: ../../asset_management/data_protection.rst:115
0389 msgid ""
0390 "As much as 1% of all computers are affected by lightning and power surges "
0391 "every year."
0392 msgstr ""
0393 "Jopa 1 % kaikista tietokoneista kokee vuosittain salamaniskun ja virtapiikin."
0394 
0395 #: ../../asset_management/data_protection.rst:117
0396 msgid ""
0397 "This is about total data loss due to power surges. Of course you can have "
0398 "the occasional data loss due to power loss before saving files. But those "
0399 "losses can normally be restored without major difficulty."
0400 msgstr ""
0401 
0402 #: ../../asset_management/data_protection.rst:119
0403 msgid ""
0404 "You don’t have to wait for the next thunderstorm to be concerned about how a "
0405 "sudden fluctuation in electric power may affect your computer system. Recent "
0406 "statistics have shown that as much as 63 percent of all electronics "
0407 "casualties are due to power problems, and most computers are subject to two "
0408 "or more power anomalies a day. Since power surges or blackouts can occur "
0409 "anywhere and at any time, it only makes sense to protect your computer by "
0410 "investing in some sort of surge protection device."
0411 msgstr ""
0412 
0413 #: ../../asset_management/data_protection.rst:122
0414 msgid "How Surges Happen"
0415 msgstr ""
0416 
0417 #: ../../asset_management/data_protection.rst:124
0418 msgid ""
0419 "A power surge occurs when the power line voltage increases over nominal "
0420 "values for more than 10 milliseconds. Sixty percent of all power surges are "
0421 "caused from within the home or office, generally when a device with a motor "
0422 "(such as a hair dryer, refrigerator, or water pump) shuts off and the power "
0423 "it was using is diverted elsewhere as excess voltage. The remaining 40 "
0424 "percent of power surges are generated by factors such as lightning, utility "
0425 "grid switching, line slapping, poor wiring, and so on."
0426 msgstr ""
0427 
0428 #: ../../asset_management/data_protection.rst:126
0429 msgid ""
0430 "While most average electricity-using devices are not affected by power "
0431 "surges, devices relying on computer chips and high-speed microprocessors are "
0432 "susceptible to serious damage. For your computer, power anomalies can result "
0433 "in keyboard lockup, complete data loss, hardware degradation, damaged "
0434 "motherboards, and more. Failure to protect yourself from the inevitable can "
0435 "result in a loss of both time and money."
0436 msgstr ""
0437 
0438 #: ../../asset_management/data_protection.rst:129
0439 msgid "Surge Protectors"
0440 msgstr ""
0441 
0442 #: ../../asset_management/data_protection.rst:131
0443 msgid ""
0444 "The most common defense against power surges is a surge protector or "
0445 "suppressor, a device that works by absorbing some of the excess energy and "
0446 "diverting the rest of it to the ground. These are usually found in the form "
0447 "of a power strip (one of those long devices that have six or so outlets and "
0448 "a single, grounded plug). Bear in mind, however, that not every power strip "
0449 "serves as a surge protector."
0450 msgstr ""
0451 
0452 #: ../../asset_management/data_protection.rst:133
0453 msgid ""
0454 "When selecting your surge protector, you want to be sure it is listed as "
0455 "meeting the UL 1449 standard, which guarantees a certain minimum of "
0456 "protection. You should also look for one that offers protection against "
0457 "lightning (not every one does) and provides insurance for equipment that is "
0458 "properly attached."
0459 msgstr ""
0460 
0461 #: ../../asset_management/data_protection.rst:135
0462 msgid ""
0463 "Because a power surge can follow any path to your computer, be sure that "
0464 "each peripheral connected to your system is protected. This includes your "
0465 "phone line or cable modem, as power can surge through these routes as well. "
0466 "A number of manufacturers are now producing surge suppressors that feature a "
0467 "phone jack for your modem along with the electrical outlets, while others "
0468 "have coaxial cable jacks for those who use a cable modem or TV tuner card."
0469 msgstr ""
0470 
0471 #: ../../asset_management/data_protection.rst:137
0472 msgid ""
0473 "If you have a notebook computer, you will want to carry a surge suppressor "
0474 "as well. A variety of suppressors designed specifically for notebooks are "
0475 "available, small in size and possessing both electric and phone outlets that "
0476 "make them ideal for use on the road."
0477 msgstr ""
0478 
0479 #: ../../asset_management/data_protection.rst:140
0480 msgid "Uninterruptible Power Supply"
0481 msgstr ""
0482 
0483 #: ../../asset_management/data_protection.rst:142
0484 msgid ""
0485 "While a surge suppressor will protect your system from minor fluctuations in "
0486 "the power lines, it won’t help you if the power should black out completely. "
0487 "Even an outage of just a few seconds can result in the loss of valuable "
0488 "data, so you might find it worthwhile to invest in an **Uninterruptible "
0489 "Power Supply** (UPS)."
0490 msgstr ""
0491 
0492 #: ../../asset_management/data_protection.rst:144
0493 msgid ""
0494 "Besides serving as surge suppressors, these devices automatically switch to "
0495 "battery power when a power outage occurs, giving you the opportunity to save "
0496 "data and shut down your system. Some models will even allow you to keep "
0497 "working until power is restored. When purchasing a UPS, be sure that it has "
0498 "the same qualities that you would seek in a surge suppressor, but also check "
0499 "out the battery life and included software."
0500 msgstr ""
0501 
0502 #: ../../asset_management/data_protection.rst:146
0503 msgid ""
0504 "Considering the potential risk to your computing system, ensuring its safety "
0505 "from power disturbances is a worthwhile investment. A quality surge "
0506 "suppressor or a 500W UPS are not too expensive for the peace of mind you’ll "
0507 "gain knowing your computer is well protected. In the very least pull all "
0508 "lines to your computer when you go on holidays."
0509 msgstr ""
0510 
0511 #: ../../asset_management/data_protection.rst:149
0512 msgid "Safeguarding Policy"
0513 msgstr ""
0514 
0515 #: ../../asset_management/data_protection.rst:152
0516 msgid "Web Storage Services"
0517 msgstr ""
0518 
0519 #: ../../asset_management/data_protection.rst:154
0520 msgid ""
0521 "Amazon Web Services includes S3 - Simple Storage Service. With appropriate "
0522 "configuration, you can mount S3 as a drive on Linux, Mac, and Windows "
0523 "systems, allowing you to use it as a backup destination for your favorite "
0524 "software. Google Shared Storage is another popular offer where one can store "
0525 "infinite amount of data."
0526 msgstr ""
0527 
0528 #: ../../asset_management/data_protection.rst:156
0529 msgid ""
0530 "It is expensive compared to hard drives at home. And you have to transfer "
0531 "the images over the (a comparatively slow) Internet."
0532 msgstr ""
0533 
0534 #: ../../asset_management/data_protection.rst:158
0535 msgid ""
0536 "We think as a safeguard against localized data loss of the most essential "
0537 "images it's not a bad idea at all, but it is not a general backup solution, "
0538 "much too slow for that."
0539 msgstr ""
0540 
0541 #: ../../asset_management/data_protection.rst:160
0542 msgid ""
0543 "Google Photo, and Flickr provide online storage services specialist on "
0544 "photographie. Their free space is limited and you don't want to have full "
0545 "resolution images online. But the pro-accounts offer more."
0546 msgstr ""
0547 
0548 #: ../../asset_management/data_protection.rst:162
0549 msgid ""
0550 "In terms of data retention the web space solution is probably pretty safe. "
0551 "Transmission errors are corrected (thanks to the TCP protocol) and the big "
0552 "companies usually have backup included plus distributed storage so that they "
0553 "are disaster proof within themselves."
0554 msgstr ""
0555 
0556 #: ../../asset_management/data_protection.rst:168
0557 msgid "digiKam Provide a Tool to Export Items to iNaturalist Web Service"
0558 msgstr ""
0559 
0560 #: ../../asset_management/data_protection.rst:171
0561 msgid "Transmission Errors"
0562 msgstr "Siirtovirheet"
0563 
0564 #: ../../asset_management/data_protection.rst:173
0565 msgid ""
0566 "Data does not only get lost from storage devices, it also gets lost when "
0567 "traveling inside the computer or across networks (although the network "
0568 "traffic itself via TCP is error protected). Errors occur on buses and in "
0569 "memory spaces. Consumer hardware has no protection against those bit errors, "
0570 "whereas it is worthwhile to look into such. You can buy ECC (error code "
0571 "correction) protected memory (which is expensive, granted). With `ECC RAM "
0572 "<https://en.wikipedia.org/wiki/ECC_memory>`_ at least the memory will be "
0573 "scrubbed for single bit errors and corrected. Double bit errors would escape "
0574 "that scheme but they occur too infrequently."
0575 msgstr ""
0576 
0577 #: ../../asset_management/data_protection.rst:179
0578 msgid "The Data Workflow Between Application and Storage Media"
0579 msgstr ""
0580 
0581 #: ../../asset_management/data_protection.rst:181
0582 msgid ""
0583 "This diagram depicts the transmission chain elements in a computer, all "
0584 "transitions are susceptible to transmission errors. The Linux `ZFS <https://"
0585 "en.wikipedia.org/wiki/ZFS>`_ and `BTRFS <https://en.wikipedia.org/wiki/"
0586 "Btrfs>`_ file system at least ensure the OS to disk path of data integrity "
0587 "under Linux."
0588 msgstr ""
0589 
0590 #: ../../asset_management/data_protection.rst:183
0591 msgid ""
0592 "The Byte Error Rate (BER) for memory and transmission channels is in the "
0593 "order of 1 in 10 Million (10E-7 bit). That just means that 1 in 3000 images "
0594 "has an error only due to transmission problems. Now how dramatic that is for "
0595 "an image is left to chance, it could mean that the image is destroyed or "
0596 "that a pixel somewhere changed its value, due to the compression used on "
0597 "almost all images one cannot predict the gravity of a single bit error "
0598 "impact. Often one sees some partial images instead of the full image."
0599 msgstr ""
0600 
0601 #: ../../asset_management/data_protection.rst:185
0602 msgid ""
0603 "The worst of all that is that nobody tells you when a transmission error "
0604 "occurs, not your hardware. All those glitches go down unheard until one day "
0605 "you open the photograph, and to your surprise it's broken. It is quite "
0606 "worrisome that there should be no protection within a computer, nobody seems "
0607 "to have thought of it. The Internet (TCP protocol) is much saver as a data "
0608 "path than inside a computer."
0609 msgstr ""
0610 
0611 #: ../../asset_management/data_protection.rst:187
0612 msgid ""
0613 "Flaky power supplies are another source of transmission losses because they "
0614 "create interference with the data streams. With normal files systems those "
0615 "errors go unnoticed."
0616 msgstr ""
0617 
0618 #: ../../asset_management/data_protection.rst:193
0619 msgid "The Storage Media Number of Failure Per Year"
0620 msgstr ""
0621 
0622 #: ../../asset_management/data_protection.rst:195
0623 msgid ""
0624 "Even if you are not overly concerned today with transmission problems, have "
0625 "a look into the future at illustration. Already in 2010 we'll see thousands "
0626 "of errors per year."
0627 msgstr ""
0628 
0629 #: ../../asset_management/data_protection.rst:198
0630 msgid "Future of File-systems"
0631 msgstr "Tiedostojärjestelmien tulevaisuus"
0632 
0633 #: ../../asset_management/data_protection.rst:200
0634 msgid ""
0635 "`ZFS <https://en.wikipedia.org/wiki/ZFS>`_ from Oracle seems to be one of "
0636 "two candidates to deal with disk errors on a low level, and it is highly "
0637 "scalable. It is Open Source, heavily patented, comes with an GPL "
0638 "incompatible license, and is available on Linux and macOS."
0639 msgstr ""
0640 
0641 #: ../../asset_management/data_protection.rst:202
0642 msgid ""
0643 "Oracle has also started an initiative with its `BTRFS <https://en.wikipedia."
0644 "org/wiki/Btrfs>`_ file system. It employs the same protection technique as "
0645 "**ZFS** does, and it's available on Linux."
0646 msgstr ""
0647 
0648 #: ../../asset_management/data_protection.rst:205
0649 msgid "Human Errors"
0650 msgstr "Inhimilliset erheet"
0651 
0652 #: ../../asset_management/data_protection.rst:208
0653 msgid "Theft And Accidents"
0654 msgstr "Varkaudet ja vahingot"
0655 
0656 #: ../../asset_management/data_protection.rst:210
0657 msgid ""
0658 "Do not underestimate it. Those two factor account for 86% of notebook and "
0659 "46% for desktop system data losses. For notebooks, theft counts for 50% "
0660 "alone."
0661 msgstr ""
0662 "Älä aliarvioi tätä. Nämä kaksi tekijää muodostavat 86 % kannettavien ja 46 % "
0663 "pöytäkoneiden tietohävikistä. Pelkästään varkauksien osuus on kannettavissa "
0664 "50 %."
0665 
0666 #: ../../asset_management/data_protection.rst:213
0667 msgid "Malware"
0668 msgstr "Pahantahtoinen sivusto"
0669 
0670 #: ../../asset_management/data_protection.rst:215
0671 msgid ""
0672 "Data loss due to viruses is less grave than common wisdom make you believe. "
0673 "It accounts for less damage than theft or re-installations, for example. And "
0674 "it is limited to Microsoft OS users. Apple users experience very few viruses "
0675 "and under Linux they haven't been around for quite some time now."
0676 msgstr ""
0677 
0678 #: ../../asset_management/data_protection.rst:218
0679 msgid "Human and Data Loss"
0680 msgstr ""
0681 
0682 #: ../../asset_management/data_protection.rst:220
0683 msgid ""
0684 "Human error, as in everything, is a major problem in data loss. Take a deep "
0685 "breath and stop. Panic is a common reaction, and people do really stupid "
0686 "things. Experienced users will pull the wrong drive from a `RAID <https://en."
0687 "wikipedia.org/wiki/RAID>`_ array or reformat a drive, destroying all their "
0688 "information. Acting without thinking is dangerous to your data. Stop "
0689 "stressing about the loss and don’t do anything to the disk. Better yet, stop "
0690 "using the computer until you have a plan. Sit down and explain you plan to a "
0691 "laymen or better, laywoman. You will be amazed how many stupid ideas you'll "
0692 "discover yourself in such an exercise."
0693 msgstr ""
0694 
0695 #: ../../asset_management/data_protection.rst:222
0696 msgid ""
0697 "If your disk is making weird noises, normal file recovery software isn’t "
0698 "going to work. Do a quick backup if that is going to happen to you. If the "
0699 "drive is still spinning and you can’t find your data, look for a data "
0700 "recovery utility and backup to another computer or drive. An Universal and "
0701 "powerful solution can be to use  `CloneZilla open-source suite <https://en."
0702 "wikipedia.org/wiki/Clonezilla>`_. The important thing is to download them "
0703 "onto another drive, either on another computer, or onto a USB thumb drive or "
0704 "hard disk. It is good practice to save the recovered data to another disk. "
0705 "`dd tool <https://en.wikipedia.org/wiki/Dd_(Unix)>`_ is your friend on Linux "
0706 "systems."
0707 msgstr ""
0708 
0709 #: ../../asset_management/data_protection.rst:225
0710 msgid "Common Myths Dispelled"
0711 msgstr "Yleisiä väärinkäsityksiä"
0712 
0713 #: ../../asset_management/data_protection.rst:227
0714 msgid "We would like to dispel some common myths:"
0715 msgstr "Haluaisimme korjata joitakin yleisiä väärinkäsityksiä:"
0716 
0717 #: ../../asset_management/data_protection.rst:229
0718 msgid ""
0719 "Open Source file systems are less prone to data loss than proprietary "
0720 "systems: Wrong, NTFS is rather a tiny notch better than ext4, ReiserFs, JFS, "
0721 "XFS, to name just the most popular file systems that often come as default "
0722 "storage format disk used by distributions."
0723 msgstr ""
0724 
0725 #: ../../asset_management/data_protection.rst:231
0726 msgid ""
0727 "Journalize files systems prevent data corruption/loss: Wrong, they only "
0728 "speed up the scan process in case of a sudden interrupt during operation and "
0729 "prevent ambiguous states. But if a file was not entirely saved before the "
0730 "mishap, it'll be lost."
0731 msgstr ""
0732 
0733 #: ../../asset_management/data_protection.rst:233
0734 msgid ""
0735 "`RAID <https://en.wikipedia.org/wiki/RAID>`_ systems prevent data corruption/"
0736 "loss: Mostly wrong, **RAID 0 and 1** prevent you from nothing, **RAID 5** "
0737 "can prevent data loss due to disk-failures (but not from disk or file system "
0738 "errors). Many low-end RAID controllers (most mother board controllers are) "
0739 "don’t report problems, figuring you’ll never notice. If you do notice, "
0740 "months later, what is the chance that you’ll know it was the controller’s "
0741 "fault? One insidious problem is corruption of **RAID 5** parity data. It is "
0742 "pretty simple to check a file by reading it and matching the metadata. "
0743 "Checking parity data is much more difficult, so you typically won’t see "
0744 "parity errors until a rebuild. Then, of course, it is too late."
0745 msgstr ""
0746 
0747 #: ../../asset_management/data_protection.rst:235
0748 msgid ""
0749 "Viruses are the biggest thread to digital data: Wrong. Theft, and human "
0750 "errors are the primary cause of data loss."
0751 msgstr ""
0752 "Virukset ovat digitaalisen tiedon suurin uhka: EPÄTOSI. Varkaus ja "
0753 "inhimilliset erheet ovat tietohävikin ensisijainen syy."
0754 
0755 #: ../../asset_management/data_protection.rst:238
0756 msgid "Storage Volume Estimation"
0757 msgstr ""
0758 
0759 #: ../../asset_management/data_protection.rst:240
0760 msgid ""
0761 "Digital camera sensors are 1-2 aperture stops away from fundamental physical "
0762 "limitations. What we mean is this: as technology evolves, there is a natural "
0763 "limit to its progress. Sensitivity and noise characteristics for any kind of "
0764 "light sensor are not far from that limit."
0765 msgstr ""
0766 
0767 #: ../../asset_management/data_protection.rst:242
0768 msgid ""
0769 "Today's cameras tend towards 50 mega pixels sensors, although this "
0770 "resolution is already too high for compact cameras and deteriorates the end "
0771 "result. Given the sensor size and quality of optics, 12 mega pixels are "
0772 "optimum for compact cameras. Even DSLR cameras run into their limits at "
0773 "20-24 mega pixels, for higher resolutions one has to go for full frame "
0774 "sensors (24x36mm) or even bigger formats."
0775 msgstr ""
0776 
0777 #: ../../asset_management/data_protection.rst:244
0778 msgid ""
0779 "So, taking into account the manufacturer mega pixel propaganda it seems save "
0780 "to say that the bulk of future cameras will see less than 30 mega pixels. "
0781 "This gives us an estimation for the necessary storage space per photograph "
0782 "in the long run: <40 MB per image. Even if file versioning will be "
0783 "introduced (grouping of variations of a photograph under one file "
0784 "reference), the trend is to implement scripting of changes so that a small "
0785 "overhead will be recorded only and not a whole different image per version. "
0786 "With faster hardware this concept will see it's maturity quite soon."
0787 msgstr ""
0788 
0789 #: ../../asset_management/data_protection.rst:246
0790 msgid ""
0791 "In order to estimate the amount of storage space you have to plan for, "
0792 "simply determine the number of photographs you take per year (easy with :ref:"
0793 "`digiKam's timeline sidebar tab <timeline_view>`) and multiply it by 40 MB. "
0794 "Most users will keep less than 2000 pictures per year which requires less "
0795 "than 80 GB/year. Assuming that you will change your hard disk (or whatever "
0796 "media in the future) every 4-5 years, the natural increase in storage "
0797 "capacity will suffice to keep you afloat."
0798 msgstr ""
0799 
0800 #: ../../asset_management/data_protection.rst:248
0801 msgid ""
0802 "The more ambitious ones out there will need more space, much more maybe. "
0803 "Think of buying a file server, Giga-Ethernet comes integrated into "
0804 "motherboards today and it's a flick to fetch the files over the local "
0805 "network. Speaking about modern mobos: they now the capability to SATA media "
0806 "through an USB connectors. This makes it really a trifle to buy an external "
0807 "SATA drive and hook it up to your machine. 4000 GB drives will hit the "
0808 "market in 2020. These are terrific compact storage containers for backup "
0809 "swapping: keep one drive at home and one somewhere else."
0810 msgstr ""
0811 
0812 #: ../../asset_management/data_protection.rst:251
0813 msgid "Backup and Recover"
0814 msgstr "Varmuuskopiointi ja palauttaminen"
0815 
0816 #: ../../asset_management/data_protection.rst:253
0817 msgid ""
0818 "A 4 TB HDD is not very expensive today. Do not blame anybody else for data "
0819 "loss. 6% of all PCs will suffer an episode of data loss in any given year. "
0820 "Backup your data often according to a plan, and back it up and test the "
0821 "backup before you do anything dramatic like re-installing your OS, changing "
0822 "disks, resizing partitions and so on."
0823 msgstr ""
0824 
0825 #: ../../asset_management/data_protection.rst:256
0826 msgid "Disaster Prevention"
0827 msgstr ""
0828 
0829 #: ../../asset_management/data_protection.rst:258
0830 msgid ""
0831 "Say, you religiously do your backups every day on a external SATA drive. "
0832 "Then comes the day where lightning strikes. Happy you if the external drive "
0833 "was not connected at that moment."
0834 msgstr ""
0835 
0836 #: ../../asset_management/data_protection.rst:260
0837 msgid ""
0838 "Disasters strike locally and destroy a lot. Forget about airplane crashes: "
0839 "fire, water, electricity, kids and theft are dangerous enough to our data. "
0840 "They usually cover a whole room or house."
0841 msgstr ""
0842 
0843 #: ../../asset_management/data_protection.rst:262
0844 msgid ""
0845 "Therefore disaster control means de-localized storage. Move your backups "
0846 "upstairs, next house, to your bureau (and vise versa), whatever."
0847 msgstr ""
0848 
0849 #: ../../asset_management/data_protection.rst:264
0850 msgid ""
0851 "There is another good aspect to the physical separation: as said above, "
0852 "panic is often the cause of destroying data, even the backup data. Having a "
0853 "backup not at hand right away may safe your ass one day."
0854 msgstr ""
0855 
0856 #: ../../asset_management/data_protection.rst:267
0857 msgid "Backup Technicalities"
0858 msgstr "Varmuuskopioinnin yksityiskohtia"
0859 
0860 #: ../../asset_management/data_protection.rst:269
0861 msgid ""
0862 "**Full Backup**: A complete backup of all the files being backed up. It is a "
0863 "snapshot without history, it represents a full copy at one point in time."
0864 msgstr ""
0865 
0866 #: ../../asset_management/data_protection.rst:271
0867 msgid ""
0868 "**Differential Backup**: A backup of only the files that have changed since "
0869 "the last full backup. Constitutes a full snapshot of two points in time: the "
0870 "full backup and the last differential one."
0871 msgstr ""
0872 
0873 #: ../../asset_management/data_protection.rst:273
0874 msgid ""
0875 "**Incremental Backup**: A backup of only the files that have changed since "
0876 "last whatever backup. Constitutes multiple snapshots. You can recreate the "
0877 "original state at any point in time such a backup was made. This comes "
0878 "closest to a versioning system except that it is only sampled and not "
0879 "continuous."
0880 msgstr ""
0881 
0882 #: ../../asset_management/data_protection.rst:276
0883 msgid "Backup The Data"
0884 msgstr "Varmuuskopioi tiedot"
0885 
0886 #: ../../asset_management/data_protection.rst:278
0887 msgid "The Best practice at all is to backup the data:"
0888 msgstr "Paras käytäntö on varmuuskopioida tiedot:"
0889 
0890 #: ../../asset_management/data_protection.rst:280
0891 msgid "Do a **full backup** in a external storage device."
0892 msgstr ""
0893 
0894 #: ../../asset_management/data_protection.rst:282
0895 msgid "Verify its **data integrity** and put it away (disaster control)."
0896 msgstr ""
0897 
0898 #: ../../asset_management/data_protection.rst:284
0899 msgid "Have another storage device for **frequent backups**."
0900 msgstr ""
0901 
0902 #: ../../asset_management/data_protection.rst:286
0903 msgid ""
0904 "**Swap the devices** every other month after having verified data integrity."
0905 msgstr ""
0906 
0907 #: ../../asset_management/data_protection.rst:289
0908 msgid "A Useful Tool to Backups"
0909 msgstr ""
0910 
0911 #: ../../asset_management/data_protection.rst:291
0912 msgid ""
0913 "Linux `rsync <https://en.wikipedia.org/wiki/Rsync>`_ is a wonderful little "
0914 "utility that's amazingly easy to set up on your machines. Rather than have a "
0915 "scripted FTP session, or some other form of file transfer script - rsync "
0916 "copies only the differences of files that have actually changed, compressed "
0917 "and through ssh if you want to for security. That's a mouthful."
0918 msgstr ""
0919 
0920 #: ../../asset_management/data_protection.rst:293
0921 msgid "A reasonable backup approach for images could be this one:"
0922 msgstr ""
0923 
0924 #: ../../asset_management/data_protection.rst:295
0925 msgid ""
0926 "Backup important images right away (after dumping them to a computer) to "
0927 "optical media."
0928 msgstr ""
0929 
0930 #: ../../asset_management/data_protection.rst:297
0931 msgid "Do daily incremental backup of the work space."
0932 msgstr ""
0933 
0934 #: ../../asset_management/data_protection.rst:299
0935 msgid ""
0936 "Do a weekly differential backup and delete integral backups of week-2 (two "
0937 "weeks ago)."
0938 msgstr ""
0939 
0940 #: ../../asset_management/data_protection.rst:301
0941 msgid "Do a monthly differential backup and delete backup of month-2."
0942 msgstr ""
0943 
0944 #: ../../asset_management/data_protection.rst:303
0945 msgid ""
0946 "If not physically separated already, separate it now (swapping-in another "
0947 "backup drive)."
0948 msgstr ""
0949 
0950 #: ../../asset_management/data_protection.rst:305
0951 msgid ""
0952 "This protocol tries to leave you enough time to spot losses and to recover "
0953 "fully at the same time keeping the backup volume at <130% of the working "
0954 "space. You end up with a daily version of the last 7-14 days, a weekly "
0955 "snapshot for at least one month, and a snapshot of every month. Any more "
0956 "thinning should be done by hand after a full verification. Preserve your "
0957 "images through the changes of technology and owners"
0958 msgstr ""
0959 
0960 #: ../../asset_management/data_protection.rst:308
0961 msgid ""
0962 "In order for your valuable images to **survive the next 40 years** or so "
0963 "(because that's about the time that you will become really interested to "
0964 "revisit those nice old photographs of you as a child, adolescent etc.) there "
0965 "are two strategies to be observed:"
0966 msgstr ""
0967 
0968 #: ../../asset_management/data_protection.rst:310
0969 msgid ""
0970 "**Keep up with technology**, don't lag behind more than a couple of years."
0971 msgstr ""
0972 
0973 #: ../../asset_management/data_protection.rst:312
0974 msgid "Save your photos in an open, **non-proprietary standard**."
0975 msgstr ""
0976 
0977 #: ../../asset_management/data_protection.rst:315
0978 msgid "Keep Up With Technology"
0979 msgstr "Pysy tekniikan perässä"
0980 
0981 #: ../../asset_management/data_protection.rst:317
0982 msgid ""
0983 "As the future is unforeseeable by nature, everything said today is to be "
0984 "taken with caution, and to be reviewed as we advance. Unfortunately there is "
0985 "no shortcut possible to some basic vigilance. Every 5-8 years at least one "
0986 "should ask oneself the question of backwards compatibility of current "
0987 "systems. The less variants we used in the past the less questions are to be "
0988 "answered in the future."
0989 msgstr ""
0990 
0991 #: ../../asset_management/data_protection.rst:319
0992 msgid ""
0993 "Of course every time you change your computer system (machine, operating "
0994 "system, applications, DRM) you have to ask yourself the same questions. "
0995 "Today, if you want to switch to Windows, you have to ask yourself three "
0996 "times if you still can import your pictures, and, more important so, if you "
0997 "are ever able to move them onto some other system or machine. Chances are "
0998 "good that you cannot. We see many people struggling around us, because "
0999 "Windows enforces a strict DRM regime. How can you proof to Windows that you "
1000 "are actually the owner of your pictures copyright?"
1001 msgstr ""
1002 
1003 #: ../../asset_management/data_protection.rst:321
1004 msgid ""
1005 "Basically the questions should be answered along the line explained in this "
1006 "document: use and change to open standards supported by a manifold of "
1007 "applications."
1008 msgstr ""
1009 
1010 #: ../../asset_management/data_protection.rst:323
1011 msgid ""
1012 "Virtualization becomes available now for everybody. So if you have an old "
1013 "system that is important for reading your images, keep it, install it as a "
1014 "virtual machine for later."
1015 msgstr ""
1016 
1017 #: ../../asset_management/data_protection.rst:325
1018 msgid ""
1019 "Otherwise the advice is quite simple: every time you change your computer "
1020 "architecture, your storage and backup technology, your file format, check it "
1021 "out, go through your library and convert to a newer standard if necessary. "
1022 "And keep to open standards."
1023 msgstr ""
1024 
1025 #: ../../asset_management/data_protection.rst:328
1026 msgid "Scalability"
1027 msgstr ""
1028 
1029 #: ../../asset_management/data_protection.rst:330
1030 msgid ""
1031 "Scalability is the tech-geek expression of the (easy) capability of a system "
1032 "to be resized, which always means up-sized."
1033 msgstr ""
1034 
1035 #: ../../asset_management/data_protection.rst:332
1036 msgid ""
1037 "Lets assume you planned for scalability and dedicated the container you want "
1038 "to increase to a separate disk or partition. On Linux system you then can "
1039 "copy and resize the container to the new disk."
1040 msgstr ""
1041 
1042 #: ../../asset_management/data_protection.rst:337
1043 msgid "Use Open File Formats"
1044 msgstr "Käytä avoimia tiedostomuotoja"
1045 
1046 #: ../../asset_management/data_protection.rst:339
1047 msgid ""
1048 "The short history of the digital era in the past 20 years has proven over "
1049 "and over again that proprietary formats are not the way to go when you want "
1050 "your data to be intelligible 10 years into the future. Microsoft is "
1051 "certainly the well known culprit of that sort because of its domineering "
1052 "market share. But other companies are actually (if inadvertently) worse "
1053 "since they may not stay long enough in the market at all or have a small "
1054 "user/contributor base only. In the case of Microsoft one has at least the "
1055 "advantage of many people sharing the same problems. Finding a solution has "
1056 "therefore much more success. Still, in some cases Microsoft is using Open "
1057 "Source documentation to understand their own systems, so badly maintained "
1058 "have been their own documentation. Usually with any given MSoffice suite one "
1059 "cannot properly read a document created with the same application two major "
1060 "versions earlier."
1061 msgstr ""
1062 
1063 #: ../../asset_management/data_protection.rst:341
1064 msgid ""
1065 "Image formats have had a longer live time than office documents and are a "
1066 "bit less affected by obsolescence."
1067 msgstr ""
1068 
1069 #: ../../asset_management/data_protection.rst:343
1070 msgid ""
1071 "Open Source standards have the huge advantage of having an open "
1072 "specification. Even if one day in the future there'll be no software to read "
1073 "it anymore, one can recreate such software, a task becoming simpler every "
1074 "year."
1075 msgstr ""
1076 
1077 #: ../../asset_management/data_protection.rst:349
1078 msgid "digiKam Image Editor Default Save Settings For Common Image Formats"
1079 msgstr ""
1080 
1081 #: ../../asset_management/data_protection.rst:351
1082 msgid ""
1083 "**JPEG** has been around for a while now, and whilst it's a lossy format "
1084 "losing a bit every time you make a modification and save it, it is "
1085 "ubiquitous, supports JFIF, Exif, IPTC and XMP metadata, has good compression "
1086 "ratios and can be read by all imaging software. Because of its metadata "
1087 "limitation, lossy nature, absence of transparency and 8 bit color channel "
1088 "depth, we do not recommend it. JPEG2000 is better, can be employed lossless, "
1089 "but lacks in user base."
1090 msgstr ""
1091 
1092 #: ../../asset_management/data_protection.rst:353
1093 msgid ""
1094 "**GIF** is a proprietary. patented format and slowly disappearing from the "
1095 "market. Don't use it."
1096 msgstr ""
1097 
1098 #: ../../asset_management/data_protection.rst:355
1099 msgid ""
1100 "**PNG** has been invented as a Open Source standard to replace GIF, but it "
1101 "does much more. It is lossless, supports XMP, Exif and IPTC metadata, 16 bit "
1102 "color encoding and full transparency. PNG can store gamma and chromaticity "
1103 "data for improved color matching on heterogeneous platforms. Its drawback "
1104 "are a relatively big footprints (but smaller than TIFF) and slow "
1105 "compression. We recommend it."
1106 msgstr ""
1107 
1108 #: ../../asset_management/data_protection.rst:357
1109 msgid ""
1110 "**TIFF** has been widely accepted as an image format. TIFF can exist in "
1111 "uncompressed form or in a container using a lossless compression algorithm "
1112 "(Deflate). It maintains high image quality but at the expense of much larger "
1113 "file sizes. Some cameras let you save your images in this format. The "
1114 "problem is that the format has been altered by so many people that there are "
1115 "now 50 or more flavors and not all are recognizable by all applications."
1116 msgstr ""
1117 
1118 #: ../../asset_management/data_protection.rst:359
1119 msgid ""
1120 "**PGF** for Progressive Graphics File is another not so known but open file "
1121 "image format. Wavelet-based, it allows lossless and lossy data compression. "
1122 "PGF compares well with **JPEG 2000** but it was developed for speed "
1123 "(compression/decompression) rather than to be the best at compression ratio. "
1124 "At the same file size a PGF file looks significantly better than a JPEG one, "
1125 "while remaining very good at progressive display too. PGF format is used "
1126 "internally in digiKam to store compressed thumbnails in the database. For "
1127 "more information about the PGF format see the `libPGF homepage <https://"
1128 "libpgf.org/>`_"
1129 msgstr ""
1130 
1131 #: ../../asset_management/data_protection.rst:365
1132 msgid "digiKam Image Editor Raw Import Tool"
1133 msgstr ""
1134 
1135 #: ../../asset_management/data_protection.rst:367
1136 msgid ""
1137 "**RAW** format. Some, typically more expensive, cameras support RAW format "
1138 "shooting. The RAW format is not really an image standard at all, it is a "
1139 "container format which is different for every brand and camera model. RAW "
1140 "format images contain minimally processed data from the image sensor of a "
1141 "digital camera or image scanner. Raw image files are sometimes called "
1142 "digital negatives, as they fulfill the same role as film negatives in "
1143 "traditional chemical photography: that is, the negative is not directly "
1144 "usable as an image, but has all of the information needed to create an "
1145 "image. Storing photographs in a camera's RAW format provides for higher "
1146 "dynamic range and allows you to alter settings, such as white balance, after "
1147 "the photograph has been taken. Most professional photographers use RAW "
1148 "format, because it offers them maximum flexibility. The downside is that RAW "
1149 "image files can be very large indeed."
1150 msgstr ""
1151 
1152 #: ../../asset_management/data_protection.rst:369
1153 msgid ""
1154 "We recommend clearly to **abstain from archiving in RAW format** (as opposed "
1155 "to shooting in RAW format, which we recommend). It has all bad ingredients: "
1156 "many varieties and proprietary nature. It is clear that in a few years time "
1157 "you cannot use your old RAW files anymore. We have already seen people "
1158 "changing camera, losing their color profiles and having great difficulty to "
1159 "treat their old RAW files correctly. Better change to DNG format."
1160 msgstr ""
1161 
1162 #: ../../asset_management/data_protection.rst:371
1163 msgid ""
1164 "**DNG** or Digital Negative file format is a royalty free and open RAW image "
1165 "format designed by Adobe Systems. DNG was a response to demand for a "
1166 "unifying camera raw file format. It is based on the TIFF/EP format, and "
1167 "mandates use of metadata. A handful of camera manufacturers have adopted DNG "
1168 "already, let's hope that the main contenders Canon and Nikon will use it one "
1169 "day. `Apple ProRAW <https://support.apple.com/en-us/HT211965>`_ format "
1170 "available since the iPhone 12 Pro Max is based on DNG."
1171 msgstr ""
1172 
1173 #: ../../asset_management/data_protection.rst:377
1174 msgid ""
1175 "digiKam Provide a Tool to Convert in Batch RAW to DNG in :ref:`Batch Queue "
1176 "Manager <dng_converter>`"
1177 msgstr ""
1178 
1179 #: ../../asset_management/data_protection.rst:379
1180 msgid ""
1181 "We strongly recommend converting RAW files to DNG for archiving. Despite the "
1182 "fact that DNG was created by Adobe, it is an open standard and widely "
1183 "embraced by the Open Source community (which is usually a good indicator of "
1184 "perennial properties). Some manufacturers have already adopted DNG as RAW "
1185 "format. And last not least, Adobe is the most important source of graphical "
1186 "software today, and they of course support their own invention. It is an "
1187 "ideal archival format, the raw sensor data will be preserved as such in TIFF "
1188 "format inside DNG, so that the risk associated with proprietary RAW formats "
1189 "is alleviated. All of this makes migration to another operating system a no-"
1190 "brainer."
1191 msgstr ""
1192 
1193 #: ../../asset_management/data_protection.rst:385
1194 msgid ""
1195 "digiKam Provide Tools to Convert RAW to DNG during :ref:`Download from "
1196 "Camera <camera_dngconvert>`"
1197 msgstr ""
1198 
1199 #: ../../asset_management/data_protection.rst:387
1200 msgid ""
1201 "**XML** for Extensible Mark-up Language or **RDF** for Resource Description "
1202 "Framework. XML is like HTML, but where HTML is mostly concerned with the "
1203 "presentation of data, XML is concerned with the *representation* of data. On "
1204 "top of that, XML is non-proprietary, operating-system-independent, fairly "
1205 "simple to interpret, text-based and cheap. RDF is the WC3's solution to "
1206 "integrate a variety of different applications such as library catalogs, "
1207 "world-wide directories, news feeds, software, as well as collections of "
1208 "music, images, and events using XML as an interchange syntax. Together the "
1209 "specifications provide a method that uses a lightweight ontology based on "
1210 "the Dublin Core which also supports the \"Semantic Web\" (easy exchange of "
1211 "knowledge on the Web)."
1212 msgstr ""
1213 
1214 #: ../../asset_management/data_protection.rst:390
1215 msgid "IPTC Goes XMP"
1216 msgstr ""
1217 
1218 #: ../../asset_management/data_protection.rst:392
1219 msgid ""
1220 "That's probably one of the reasons why, around 2001, that Adobe introduced "
1221 "its XML based XMP technology to replace the *Image Resource Block* "
1222 "technology of the nineties. XMP stands for **Extensible Metadata Platform**, "
1223 "a mixture of XML and RDF. It is a labeling technology that lets users embed "
1224 "data about a file in the file itself, the file info is saved using the "
1225 "extension :file:`*.xmp*` (signifying the use of XML/RDF)."
1226 msgstr ""
1227 
1228 #: ../../asset_management/data_protection.rst:394
1229 msgid ""
1230 "`XMP <https://en.wikipedia.org/wiki/Extensible_Metadata_Platform>`_: As much "
1231 "as ODF will be readable forever (since its containing text is written in "
1232 "clear text), XMP will preserve your metadata in a clearly understandable "
1233 "format XML. No danger here of not being able to read it later. It can be "
1234 "embedded into the image files or as a separate accompanying file "
1235 "(**Sidecar** concept). XMP can be used in PDF, JPEG, JPEG2000, GIF, PNG, "
1236 "HTML, TIFF, Adobe Illustrator, PSD, Postscript, Encapsulated Postscript, and "
1237 "video files. In a typical edited JPEG file, XMP information is typically "
1238 "included alongside Exif and IPTC data."
1239 msgstr ""
1240 
1241 #: ../../asset_management/data_protection.rst:400
1242 msgid "digiKam can display XMP Contents from Image and Video"
1243 msgstr ""
1244 
1245 #: ../../asset_management/data_protection.rst:402
1246 msgid ""
1247 "Embedding metadata in files allows easy sharing and transfer of files across "
1248 "products, vendors, platforms, customers, without metadata getting lost. The "
1249 "most common metadata tags recorded in XMP data are those from the Dublin "
1250 "Core Metadata Initiative, which include things like title, description, "
1251 "creator, and so on. The standard is designed to be extensible, allowing "
1252 "users to add their own custom types of metadata into the XMP data. XMP "
1253 "generally does not allow binary data types to be embedded. This means that "
1254 "any binary data one wants to carry in XMP, such as thumbnail images, must be "
1255 "encoded in some XML-friendly format, such as Base-64."
1256 msgstr ""
1257 
1258 #: ../../asset_management/data_protection.rst:404
1259 msgid ""
1260 "Many photographers prefer keeping an original of their shots (mostly RAW) "
1261 "for the archive. XMP suits that approach as it keeps metadata separate from "
1262 "the image file. We do not share this point of view. There could be problems "
1263 "linking metadata file and image file, and as said above, RAW formats will "
1264 "become obsolete. We recommend using DNG as a container and putting "
1265 "everything inside."
1266 msgstr ""
1267 
1268 #: ../../asset_management/data_protection.rst:406
1269 msgid ""
1270 "The `Dublin Core Metadata Initiative <https://www.dublincore.org/>`_ is an "
1271 "open organization engaged in the development of interoperable online "
1272 "metadata standards that support a broad range of purposes and business "
1273 "models. DCMI's activities include work on architecture and modeling, "
1274 "discussions and collaborative work in DCMI Communities and DCMI Task Groups, "
1275 "annual conferences and workshops, standards liaison, and educational efforts "
1276 "to promote widespread acceptance of metadata standards and practices."
1277 msgstr ""
1278 
1279 #: ../../asset_management/data_protection.rst:412
1280 msgid "digiKam Support Sidecar Files With many Options From Settings Panel"
1281 msgstr ""
1282 
1283 #: ../../asset_management/data_protection.rst:415
1284 msgid "Protect Your Data"
1285 msgstr "Suojaa tietosi"
1286 
1287 #: ../../asset_management/data_protection.rst:417
1288 msgid "Use surge protectors (UL 1449 standard), possibly combined with a UPS."
1289 msgstr ""
1290 
1291 #: ../../asset_management/data_protection.rst:419
1292 msgid ""
1293 "Use ECC memory to verify correct data transmission (even just saving files)."
1294 msgstr ""
1295 
1296 #: ../../asset_management/data_protection.rst:421
1297 msgid "Watch your hard drives (temperature, noise...), make backups."
1298 msgstr ""
1299 
1300 #: ../../asset_management/data_protection.rst:423
1301 msgid "Keep backups at another location, locked up, use web storage space."
1302 msgstr ""
1303 
1304 #: ../../asset_management/data_protection.rst:425
1305 msgid "Use archival media and burners."
1306 msgstr ""
1307 
1308 #: ../../asset_management/data_protection.rst:427
1309 msgid ""
1310 "Don't panic in case of data loss, explain your recovery plan to a layperson."
1311 msgstr ""
1312 
1313 #: ../../asset_management/data_protection.rst:429
1314 msgid ""
1315 "Choose you file system, partitions, folders to cater for easy scalability."
1316 msgstr ""
1317 
1318 #: ../../asset_management/data_protection.rst:431
1319 msgid "Use open, non-proprietary standards to manage and save photographs."
1320 msgstr ""
1321 
1322 #: ../../asset_management/data_protection.rst:433
1323 msgid "Do a technology/migration review at least every 5 years."
1324 msgstr "Tarkasta tekniikka ja siirrettävyys vähintään viiden vuoden välein."