Warning, /documentation/digikam-doc/locale/fi/LC_MESSAGES/asset_management/data_protection.po is written in an unsupported language. File is not indexed.
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."