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0001 # Lithuanian translations for Digikam Manual package.
0002 # 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
0003 # This file is distributed under the same license as the Digikam Manual package.
0004 # Automatically generated, 2023.
0005 #
0006 msgid ""
0007 msgstr ""
0008 "Project-Id-Version: Digikam Manual 8.0.0\n"
0009 "Report-Msgid-Bugs-To: \n"
0010 "POT-Creation-Date: 2023-12-30 00:35+0000\n"
0011 "PO-Revision-Date: 2023-02-06 00:52+0000\n"
0012 "Last-Translator: Automatically generated\n"
0013 "Language-Team: none\n"
0014 "Language: lt\n"
0015 "MIME-Version: 1.0\n"
0016 "Content-Type: text/plain; charset=UTF-8\n"
0017 "Content-Transfer-Encoding: 8bit\n"
0018 "Plural-Forms: nplurals=4; plural=(n==1 ? 0 : n%10>=2 && (n%100<10 || n"
0019 "%100>=20) ? 1 : n%10==0 || (n%100>10 && n%100<20) ? 2 : 3);\n"
0020 
0021 #: ../../asset_management/data_protection.rst:1
0022 msgid "Protect Your Images from Data Corruption and Loss"
0023 msgstr ""
0024 
0025 #: ../../asset_management/data_protection.rst:1
0026 msgid ""
0027 "digiKam, documentation, user manual, photo management, open source, free, "
0028 "learn, easy, disk errors, disk failures, power surges, ECC, transmission "
0029 "errors, storage media deterioration, recovery, redundancy, disaster "
0030 "prevention, lifetime, temperature, data size, common myths, metadata, IPTC "
0031 "stored in image files, XMP files associated, keep the originals, storage, "
0032 "scalability, media, retrieval of images and metadata, copying image data "
0033 "over to the next generation of media, applications, operating systems, "
0034 "virtualization, viewing device, use of the www, ZFS, BTRFS"
0035 msgstr ""
0036 
0037 #: ../../asset_management/data_protection.rst:14
0038 msgid "Data Corruption and Loss"
0039 msgstr ""
0040 
0041 #: ../../asset_management/data_protection.rst:16
0042 msgid "Contents"
0043 msgstr ""
0044 
0045 #: ../../asset_management/data_protection.rst:19
0046 msgid "Main Factors of Digital Data Loss"
0047 msgstr ""
0048 
0049 #: ../../asset_management/data_protection.rst:21
0050 msgid ""
0051 "Of course we're not talking about losing Blue-rays on the road or in a fire "
0052 "- that kind of loss is just the same as traditional paper copies or "
0053 "negatives. We are talking about problems with the so called *New Media*."
0054 msgstr ""
0055 
0056 #: ../../asset_management/data_protection.rst:23
0057 msgid ""
0058 "Problems with digital data can roughly be categorized into the following "
0059 "areas of concern:"
0060 msgstr ""
0061 
0062 #: ../../asset_management/data_protection.rst:25
0063 msgid ""
0064 "The physical deterioration of the media (all media deteriorate at different "
0065 "time scales)."
0066 msgstr ""
0067 
0068 #: ../../asset_management/data_protection.rst:27
0069 msgid "Undetected transmission errors during data transfer."
0070 msgstr ""
0071 
0072 #: ../../asset_management/data_protection.rst:29
0073 msgid ""
0074 "The lack of support for long-date, undoubtedly proprietary, digital formats."
0075 msgstr ""
0076 
0077 #: ../../asset_management/data_protection.rst:31
0078 msgid "Ancient hardware."
0079 msgstr ""
0080 
0081 #: ../../asset_management/data_protection.rst:33
0082 msgid ""
0083 "Kroll Ontrack, the worlds largest data recovery firm, have some interesting "
0084 "statistics on what actually causes data loss."
0085 msgstr ""
0086 
0087 #: ../../asset_management/data_protection.rst:36
0088 msgid "Cause of data loss"
0089 msgstr ""
0090 
0091 #: ../../asset_management/data_protection.rst:36
0092 msgid "Perception"
0093 msgstr ""
0094 
0095 #: ../../asset_management/data_protection.rst:36
0096 msgid "Reality"
0097 msgstr ""
0098 
0099 #: ../../asset_management/data_protection.rst:38
0100 msgid "Hardware or system problem"
0101 msgstr ""
0102 
0103 #: ../../asset_management/data_protection.rst:38
0104 msgid "78%"
0105 msgstr ""
0106 
0107 #: ../../asset_management/data_protection.rst:38
0108 msgid "56%"
0109 msgstr ""
0110 
0111 #: ../../asset_management/data_protection.rst:39
0112 msgid "Human error"
0113 msgstr ""
0114 
0115 #: ../../asset_management/data_protection.rst:39
0116 msgid "11%"
0117 msgstr ""
0118 
0119 #: ../../asset_management/data_protection.rst:39
0120 msgid "26%"
0121 msgstr ""
0122 
0123 #: ../../asset_management/data_protection.rst:40
0124 msgid "Software corruption or problem"
0125 msgstr ""
0126 
0127 #: ../../asset_management/data_protection.rst:40
0128 msgid "7%"
0129 msgstr ""
0130 
0131 #: ../../asset_management/data_protection.rst:40
0132 msgid "9%"
0133 msgstr ""
0134 
0135 #: ../../asset_management/data_protection.rst:41
0136 msgid "Computer viruses"
0137 msgstr ""
0138 
0139 #: ../../asset_management/data_protection.rst:41
0140 msgid "2%"
0141 msgstr ""
0142 
0143 #: ../../asset_management/data_protection.rst:41
0144 msgid "4%"
0145 msgstr ""
0146 
0147 #: ../../asset_management/data_protection.rst:42
0148 msgid "Disaster"
0149 msgstr ""
0150 
0151 #: ../../asset_management/data_protection.rst:42
0152 msgid "1-2%"
0153 msgstr ""
0154 
0155 #: ../../asset_management/data_protection.rst:45
0156 msgid "So let us analyze those cases step by step."
0157 msgstr ""
0158 
0159 #: ../../asset_management/data_protection.rst:50
0160 msgid "Storage Deterioration"
0161 msgstr ""
0162 
0163 #: ../../asset_management/data_protection.rst:52
0164 msgid ""
0165 "Devices listed below are sorted by data speed access feature, from the less "
0166 "faster to the most faster."
0167 msgstr ""
0168 
0169 #: ../../asset_management/data_protection.rst:55
0170 msgid "Magnetic Media"
0171 msgstr ""
0172 
0173 #: ../../asset_management/data_protection.rst:57
0174 msgid ""
0175 "Magnetic tapes are used in backup systems, much more in professional "
0176 "environments than in home use. Tapes have issues with data retention and "
0177 "changing technology, but they are safer in one aspect than optical drives: "
0178 "they are less exposed to scratches and dirt and writing deficiencies. On the "
0179 "other hand they are susceptible to magnetic fields. Throw a magnet next to a "
0180 "tape and it's gone. Tapes should be re-copied every 5-8 years, otherwise too "
0181 "many bits will fail and escape the checksum protection. The downside of "
0182 "magnetic tapes is often the recorder price and the restore time (20x longer "
0183 "than from HDD). Tape backup system have seen their best days."
0184 msgstr ""
0185 
0186 #: ../../asset_management/data_protection.rst:60
0187 msgid "Optical Drives"
0188 msgstr ""
0189 
0190 #: ../../asset_management/data_protection.rst:62
0191 msgid ""
0192 "Physical deterioration of the media happens more rapidly with paper and CD-"
0193 "Rs than the average of film. Yet while film lasts longer (sometimes decades "
0194 "longer) than other forms of media, the right kind of backup of digital media "
0195 "never loses anything. Film decays - digital 1's and 0's do not, and film "
0196 "starts to decay the moment it's created and developed. It will never have "
0197 "the same color, contrast, etc. that it did have a moment before. Digital "
0198 "doesn't do that. However, digital is susceptible to corruption. And yes, "
0199 "physical media such as floppies and magnetic hard drives are also "
0200 "susceptible to the decay of the medium, just like CDs are. They just last "
0201 "longer."
0202 msgstr ""
0203 
0204 #: ../../asset_management/data_protection.rst:64
0205 msgid ""
0206 "To combat the problem of optical drives, they need to be properly cared for "
0207 "and not trusted for more than a few years. Thankfully you can purchase "
0208 "archive-quality CDs and DVDs which last longer, though they are much more "
0209 "difficult to obtain and are much more expensive. There are offers out there "
0210 "for gold-plated optical drive, few euros a piece claiming 100 years storage "
0211 "life (if you care to believe it)."
0212 msgstr ""
0213 
0214 #: ../../asset_management/data_protection.rst:66
0215 msgid ""
0216 "Optical disks may become unreadable, but you can reduce the risk using good "
0217 "disks and a good recorder, and storing them in a correct way. The best "
0218 "optical drive recorders are not much more expensive than the cheapest, but "
0219 "they write in a much more reliable way. It's a matter of choosing the right "
0220 "one."
0221 msgstr ""
0222 
0223 #: ../../asset_management/data_protection.rst:68
0224 msgid ""
0225 "Essentially, optical drives are very prone to errors, even in a freshly "
0226 "written state. That's why they are heavily protected with a checksum "
0227 "mechanism (75% of data are effective data, the rest is formatting and "
0228 "checksum overhead). But even with that massive amount of protection they "
0229 "will suffer deterioration from chemical aging, ultra-violet exposure, "
0230 "scratches, dust, etc."
0231 msgstr ""
0232 
0233 #: ../../asset_management/data_protection.rst:70
0234 msgid ""
0235 "For damaged optical drives, Wikipedia `list all common applications <https://"
0236 "en.wikipedia.org/wiki/Data_recovery#List_of_data_recovery_software>`_ "
0237 "designed to get data from damaged floppies, hard drives, flash media such as "
0238 "camera memory and USB drives, and so forth."
0239 msgstr ""
0240 
0241 #: ../../asset_management/data_protection.rst:72
0242 msgid ""
0243 "Dual-layer optical media Blu-ray disk can store 50 GB, almost six times the "
0244 "capacity of a dual layer DVD at 8.5 GB. Everything that has been said about "
0245 "CDs/DVDs applies to Blu-ray disks as well."
0246 msgstr ""
0247 
0248 #: ../../asset_management/data_protection.rst:74
0249 msgid ""
0250 "Best practice: burn them slowly with a good recorder on archive quality "
0251 "media in an open, non-proprietary format, read the data back to verify, "
0252 "label them with some descriptive text + date & author, lock them away where "
0253 "it is clean, dark, animal safe and dry. And do not forget to copy them over "
0254 "to the next generation of media before you throw away your last piece of "
0255 "hardware or software able to read them."
0256 msgstr ""
0257 
0258 #: ../../asset_management/data_protection.rst:77
0259 msgid "Hard Disks"
0260 msgstr ""
0261 
0262 #: ../../asset_management/data_protection.rst:79
0263 msgid ""
0264 "Hard Disk (HDD) manufacturers keep their statistics to themselves. A "
0265 "manufacturer guaranty buys you a new disk, but no data. Google for One has "
0266 "done a large scale study on `HDD <https://en.wikipedia.org/wiki/"
0267 "Hard_disk_drive>`_ failure mechanisms: `Disk Failures study <https://"
0268 "research.google.com/archive/disk_failures.pdf>`_."
0269 msgstr ""
0270 
0271 #: ../../asset_management/data_protection.rst:81
0272 msgid ""
0273 "In a nutshell: Disks run longest when operating between 35°C and 45°C, at "
0274 "lower temperatures the error rates increases dramatically. Controller parts "
0275 "(electronics) are the foremost sources of failure, SMART does not diagnose "
0276 "any of this. Some `SMART <https://en.wikipedia.org/wiki/Self-Monitoring,"
0277 "_Analysis_and_Reporting_Technology>`_ errors are indicative of imminent "
0278 "failure, in particular scan errors and relocation counts. Lifetime "
0279 "expectancy is 4-5 years."
0280 msgstr ""
0281 
0282 #: ../../asset_management/data_protection.rst:83
0283 msgid ""
0284 "In general and contrary to intuition or ecological considerations, running a "
0285 "hard drive permanently results in a longer lifetime than switching it on and "
0286 "off all the time. It has even been reported that aggressive power management "
0287 "spinning down the drive can harm it quickly. Making it working hard shortens "
0288 "the lifetime somewhat. The worst factors for HDD probably are vibrations, "
0289 "shocks, and cold temperatures."
0290 msgstr ""
0291 
0292 #: ../../asset_management/data_protection.rst:85
0293 msgid ""
0294 "If your disk is making weird noises, normal file recovery software isn’t "
0295 "going to work. Do a quick backup if that is going to happen to you. (Use dd "
0296 "utility if possible, not a normal file backup since dd reads in a smooth, "
0297 "spiraling stream from beginning to end and doesn't stress the mechanics). "
0298 "There are specialist companies that can recover data from otherwise "
0299 "destroyed drive, but they are very expensive."
0300 msgstr ""
0301 
0302 #: ../../asset_management/data_protection.rst:87
0303 msgid ""
0304 "Linux `SmartMonTools <https://en.wikipedia.org/wiki/Smartmontools>`_ suite "
0305 "allows to query the storage hardware devices for future failure. We highly "
0306 "recommend to use this kind of tool on your computer."
0307 msgstr ""
0308 
0309 #: ../../asset_management/data_protection.rst:90
0310 msgid "Solid State Drives"
0311 msgstr ""
0312 
0313 #: ../../asset_management/data_protection.rst:92
0314 msgid ""
0315 "`SSDs <https://en.wikipedia.org/wiki/Solid-state_drive>`_ are mechanically "
0316 "more robust than HDDs and suffer much less on that front when they are "
0317 "plugged into the computer. They will replace HDD in time as capacity, "
0318 "robustest, and price become more and more a good solution as permanent data "
0319 "storage devices."
0320 msgstr ""
0321 
0322 #: ../../asset_management/data_protection.rst:94
0323 msgid ""
0324 "In case of use as external device, one major cause for data loss (often "
0325 "recoverable) is the unsafe removal of SSDs from a computer. Before data is "
0326 "saved from a computer memory to any attached device, it remains for some "
0327 "time in buffers. In hard drives this means seconds at most, whereas with "
0328 "SSDs it can be tens of minutes. Therefore, before you disconnect a flash "
0329 "device, always activate data flushing through software (often called *safely "
0330 "remove device*)."
0331 msgstr ""
0332 
0333 #: ../../asset_management/data_protection.rst:97
0334 msgid "Non-Volatile Memory"
0335 msgstr ""
0336 
0337 #: ../../asset_management/data_protection.rst:99
0338 msgid ""
0339 "`NVM Express (NVMe) <https://en.wikipedia.org/wiki/NVMe>`_ for Non-Volatile "
0340 "Memory is a logical-device interface for accessing a computer's non-volatile "
0341 "storage media attached PCI Express (PCIe) bus. It use same very fast NAND "
0342 "flash memory used in SSDs, but use the M.2 cards interface instead the "
0343 "slower mSATA used with older HDDs."
0344 msgstr ""
0345 
0346 #: ../../asset_management/data_protection.rst:101
0347 msgid ""
0348 "NVMe allows host hardware and software to fully exploit the levels of "
0349 "parallelism possible in modern SSDs. NVMe reduces I/O overhead and brings "
0350 "various performance improvements relative to previous SSDs. mSATA interface "
0351 "protocols were developed for use with far slower HDDs where a very lengthy "
0352 "delay exists between a request and data transfer, where data speeds are much "
0353 "slower than RAM speeds."
0354 msgstr ""
0355 
0356 #: ../../asset_management/data_protection.rst:103
0357 msgid ""
0358 "For a viability viewpoint, as NVMe devices uses the same hardware than SSDs "
0359 "to store data, the robustness must be the same."
0360 msgstr ""
0361 
0362 #: ../../asset_management/data_protection.rst:107
0363 msgid ""
0364 "**In all cases SSDs or NVMe as internal devices are the more modern and "
0365 "efficient solution to host the digiKam databases and the collections.**"
0366 msgstr ""
0367 
0368 #: ../../asset_management/data_protection.rst:110
0369 msgid "Power Supply Failures"
0370 msgstr ""
0371 
0372 #: ../../asset_management/data_protection.rst:113
0373 msgid "Power Surges"
0374 msgstr ""
0375 
0376 #: ../../asset_management/data_protection.rst:115
0377 msgid ""
0378 "As much as 1% of all computers are affected by lightning and power surges "
0379 "every year."
0380 msgstr ""
0381 
0382 #: ../../asset_management/data_protection.rst:117
0383 msgid ""
0384 "This is about total data loss due to power surges. Of course you can have "
0385 "the occasional data loss due to power loss before saving files. But those "
0386 "losses can normally be restored without major difficulty."
0387 msgstr ""
0388 
0389 #: ../../asset_management/data_protection.rst:119
0390 msgid ""
0391 "You don’t have to wait for the next thunderstorm to be concerned about how a "
0392 "sudden fluctuation in electric power may affect your computer system. Recent "
0393 "statistics have shown that as much as 63 percent of all electronics "
0394 "casualties are due to power problems, and most computers are subject to two "
0395 "or more power anomalies a day. Since power surges or blackouts can occur "
0396 "anywhere and at any time, it only makes sense to protect your computer by "
0397 "investing in some sort of surge protection device."
0398 msgstr ""
0399 
0400 #: ../../asset_management/data_protection.rst:122
0401 msgid "How Surges Happen"
0402 msgstr ""
0403 
0404 #: ../../asset_management/data_protection.rst:124
0405 msgid ""
0406 "A power surge occurs when the power line voltage increases over nominal "
0407 "values for more than 10 milliseconds. Sixty percent of all power surges are "
0408 "caused from within the home or office, generally when a device with a motor "
0409 "(such as a hair dryer, refrigerator, or water pump) shuts off and the power "
0410 "it was using is diverted elsewhere as excess voltage. The remaining 40 "
0411 "percent of power surges are generated by factors such as lightning, utility "
0412 "grid switching, line slapping, poor wiring, and so on."
0413 msgstr ""
0414 
0415 #: ../../asset_management/data_protection.rst:126
0416 msgid ""
0417 "While most average electricity-using devices are not affected by power "
0418 "surges, devices relying on computer chips and high-speed microprocessors are "
0419 "susceptible to serious damage. For your computer, power anomalies can result "
0420 "in keyboard lockup, complete data loss, hardware degradation, damaged "
0421 "motherboards, and more. Failure to protect yourself from the inevitable can "
0422 "result in a loss of both time and money."
0423 msgstr ""
0424 
0425 #: ../../asset_management/data_protection.rst:129
0426 msgid "Surge Protectors"
0427 msgstr ""
0428 
0429 #: ../../asset_management/data_protection.rst:131
0430 msgid ""
0431 "The most common defense against power surges is a surge protector or "
0432 "suppressor, a device that works by absorbing some of the excess energy and "
0433 "diverting the rest of it to the ground. These are usually found in the form "
0434 "of a power strip (one of those long devices that have six or so outlets and "
0435 "a single, grounded plug). Bear in mind, however, that not every power strip "
0436 "serves as a surge protector."
0437 msgstr ""
0438 
0439 #: ../../asset_management/data_protection.rst:133
0440 msgid ""
0441 "When selecting your surge protector, you want to be sure it is listed as "
0442 "meeting the UL 1449 standard, which guarantees a certain minimum of "
0443 "protection. You should also look for one that offers protection against "
0444 "lightning (not every one does) and provides insurance for equipment that is "
0445 "properly attached."
0446 msgstr ""
0447 
0448 #: ../../asset_management/data_protection.rst:135
0449 msgid ""
0450 "Because a power surge can follow any path to your computer, be sure that "
0451 "each peripheral connected to your system is protected. This includes your "
0452 "phone line or cable modem, as power can surge through these routes as well. "
0453 "A number of manufacturers are now producing surge suppressors that feature a "
0454 "phone jack for your modem along with the electrical outlets, while others "
0455 "have coaxial cable jacks for those who use a cable modem or TV tuner card."
0456 msgstr ""
0457 
0458 #: ../../asset_management/data_protection.rst:137
0459 msgid ""
0460 "If you have a notebook computer, you will want to carry a surge suppressor "
0461 "as well. A variety of suppressors designed specifically for notebooks are "
0462 "available, small in size and possessing both electric and phone outlets that "
0463 "make them ideal for use on the road."
0464 msgstr ""
0465 
0466 #: ../../asset_management/data_protection.rst:140
0467 msgid "Uninterruptible Power Supply"
0468 msgstr ""
0469 
0470 #: ../../asset_management/data_protection.rst:142
0471 msgid ""
0472 "While a surge suppressor will protect your system from minor fluctuations in "
0473 "the power lines, it won’t help you if the power should black out completely. "
0474 "Even an outage of just a few seconds can result in the loss of valuable "
0475 "data, so you might find it worthwhile to invest in an **Uninterruptible "
0476 "Power Supply** (UPS)."
0477 msgstr ""
0478 
0479 #: ../../asset_management/data_protection.rst:144
0480 msgid ""
0481 "Besides serving as surge suppressors, these devices automatically switch to "
0482 "battery power when a power outage occurs, giving you the opportunity to save "
0483 "data and shut down your system. Some models will even allow you to keep "
0484 "working until power is restored. When purchasing a UPS, be sure that it has "
0485 "the same qualities that you would seek in a surge suppressor, but also check "
0486 "out the battery life and included software."
0487 msgstr ""
0488 
0489 #: ../../asset_management/data_protection.rst:146
0490 msgid ""
0491 "Considering the potential risk to your computing system, ensuring its safety "
0492 "from power disturbances is a worthwhile investment. A quality surge "
0493 "suppressor or a 500W UPS are not too expensive for the peace of mind you’ll "
0494 "gain knowing your computer is well protected. In the very least pull all "
0495 "lines to your computer when you go on holidays."
0496 msgstr ""
0497 
0498 #: ../../asset_management/data_protection.rst:149
0499 msgid "Safeguarding Policy"
0500 msgstr ""
0501 
0502 #: ../../asset_management/data_protection.rst:152
0503 msgid "Web Storage Services"
0504 msgstr ""
0505 
0506 #: ../../asset_management/data_protection.rst:154
0507 msgid ""
0508 "Amazon Web Services includes S3 - Simple Storage Service. With appropriate "
0509 "configuration, you can mount S3 as a drive on Linux, Mac, and Windows "
0510 "systems, allowing you to use it as a backup destination for your favorite "
0511 "software. Google Shared Storage is another popular offer where one can store "
0512 "infinite amount of data."
0513 msgstr ""
0514 
0515 #: ../../asset_management/data_protection.rst:156
0516 msgid ""
0517 "It is expensive compared to hard drives at home. And you have to transfer "
0518 "the images over the (a comparatively slow) Internet."
0519 msgstr ""
0520 
0521 #: ../../asset_management/data_protection.rst:158
0522 msgid ""
0523 "We think as a safeguard against localized data loss of the most essential "
0524 "images it's not a bad idea at all, but it is not a general backup solution, "
0525 "much too slow for that."
0526 msgstr ""
0527 
0528 #: ../../asset_management/data_protection.rst:160
0529 msgid ""
0530 "Google Photo, and Flickr provide online storage services specialist on "
0531 "photographie. Their free space is limited and you don't want to have full "
0532 "resolution images online. But the pro-accounts offer more."
0533 msgstr ""
0534 
0535 #: ../../asset_management/data_protection.rst:162
0536 msgid ""
0537 "In terms of data retention the web space solution is probably pretty safe. "
0538 "Transmission errors are corrected (thanks to the TCP protocol) and the big "
0539 "companies usually have backup included plus distributed storage so that they "
0540 "are disaster proof within themselves."
0541 msgstr ""
0542 
0543 #: ../../asset_management/data_protection.rst:168
0544 msgid "digiKam Provide a Tool to Export Items to iNaturalist Web Service"
0545 msgstr ""
0546 
0547 #: ../../asset_management/data_protection.rst:171
0548 msgid "Transmission Errors"
0549 msgstr ""
0550 
0551 #: ../../asset_management/data_protection.rst:173
0552 msgid ""
0553 "Data does not only get lost from storage devices, it also gets lost when "
0554 "traveling inside the computer or across networks (although the network "
0555 "traffic itself via TCP is error protected). Errors occur on buses and in "
0556 "memory spaces. Consumer hardware has no protection against those bit errors, "
0557 "whereas it is worthwhile to look into such. You can buy ECC (error code "
0558 "correction) protected memory (which is expensive, granted). With `ECC RAM "
0559 "<https://en.wikipedia.org/wiki/ECC_memory>`_ at least the memory will be "
0560 "scrubbed for single bit errors and corrected. Double bit errors would escape "
0561 "that scheme but they occur too infrequently."
0562 msgstr ""
0563 
0564 #: ../../asset_management/data_protection.rst:179
0565 msgid "The Data Workflow Between Application and Storage Media"
0566 msgstr ""
0567 
0568 #: ../../asset_management/data_protection.rst:181
0569 msgid ""
0570 "This diagram depicts the transmission chain elements in a computer, all "
0571 "transitions are susceptible to transmission errors. The Linux `ZFS <https://"
0572 "en.wikipedia.org/wiki/ZFS>`_ and `BTRFS <https://en.wikipedia.org/wiki/"
0573 "Btrfs>`_ file system at least ensure the OS to disk path of data integrity "
0574 "under Linux."
0575 msgstr ""
0576 
0577 #: ../../asset_management/data_protection.rst:183
0578 msgid ""
0579 "The Byte Error Rate (BER) for memory and transmission channels is in the "
0580 "order of 1 in 10 Million (10E-7 bit). That just means that 1 in 3000 images "
0581 "has an error only due to transmission problems. Now how dramatic that is for "
0582 "an image is left to chance, it could mean that the image is destroyed or "
0583 "that a pixel somewhere changed its value, due to the compression used on "
0584 "almost all images one cannot predict the gravity of a single bit error "
0585 "impact. Often one sees some partial images instead of the full image."
0586 msgstr ""
0587 
0588 #: ../../asset_management/data_protection.rst:185
0589 msgid ""
0590 "The worst of all that is that nobody tells you when a transmission error "
0591 "occurs, not your hardware. All those glitches go down unheard until one day "
0592 "you open the photograph, and to your surprise it's broken. It is quite "
0593 "worrisome that there should be no protection within a computer, nobody seems "
0594 "to have thought of it. The Internet (TCP protocol) is much saver as a data "
0595 "path than inside a computer."
0596 msgstr ""
0597 
0598 #: ../../asset_management/data_protection.rst:187
0599 msgid ""
0600 "Flaky power supplies are another source of transmission losses because they "
0601 "create interference with the data streams. With normal files systems those "
0602 "errors go unnoticed."
0603 msgstr ""
0604 
0605 #: ../../asset_management/data_protection.rst:193
0606 msgid "The Storage Media Number of Failure Per Year"
0607 msgstr ""
0608 
0609 #: ../../asset_management/data_protection.rst:195
0610 msgid ""
0611 "Even if you are not overly concerned today with transmission problems, have "
0612 "a look into the future at illustration. Already in 2010 we'll see thousands "
0613 "of errors per year."
0614 msgstr ""
0615 
0616 #: ../../asset_management/data_protection.rst:198
0617 msgid "Future of File-systems"
0618 msgstr ""
0619 
0620 #: ../../asset_management/data_protection.rst:200
0621 msgid ""
0622 "`ZFS <https://en.wikipedia.org/wiki/ZFS>`_ from Oracle seems to be one of "
0623 "two candidates to deal with disk errors on a low level, and it is highly "
0624 "scalable. It is Open Source, heavily patented, comes with an GPL "
0625 "incompatible license, and is available on Linux and macOS."
0626 msgstr ""
0627 
0628 #: ../../asset_management/data_protection.rst:202
0629 msgid ""
0630 "Oracle has also started an initiative with its `BTRFS <https://en.wikipedia."
0631 "org/wiki/Btrfs>`_ file system. It employs the same protection technique as "
0632 "**ZFS** does, and it's available on Linux."
0633 msgstr ""
0634 
0635 #: ../../asset_management/data_protection.rst:205
0636 msgid "Human Errors"
0637 msgstr ""
0638 
0639 #: ../../asset_management/data_protection.rst:208
0640 msgid "Theft And Accidents"
0641 msgstr ""
0642 
0643 #: ../../asset_management/data_protection.rst:210
0644 msgid ""
0645 "Do not underestimate it. Those two factor account for 86% of notebook and "
0646 "46% for desktop system data losses. For notebooks, theft counts for 50% "
0647 "alone."
0648 msgstr ""
0649 
0650 #: ../../asset_management/data_protection.rst:213
0651 msgid "Malware"
0652 msgstr ""
0653 
0654 #: ../../asset_management/data_protection.rst:215
0655 msgid ""
0656 "Data loss due to viruses is less grave than common wisdom make you believe. "
0657 "It accounts for less damage than theft or re-installations, for example. And "
0658 "it is limited to Microsoft OS users. Apple users experience very few viruses "
0659 "and under Linux they haven't been around for quite some time now."
0660 msgstr ""
0661 
0662 #: ../../asset_management/data_protection.rst:218
0663 msgid "Human and Data Loss"
0664 msgstr ""
0665 
0666 #: ../../asset_management/data_protection.rst:220
0667 msgid ""
0668 "Human error, as in everything, is a major problem in data loss. Take a deep "
0669 "breath and stop. Panic is a common reaction, and people do really stupid "
0670 "things. Experienced users will pull the wrong drive from a `RAID <https://en."
0671 "wikipedia.org/wiki/RAID>`_ array or reformat a drive, destroying all their "
0672 "information. Acting without thinking is dangerous to your data. Stop "
0673 "stressing about the loss and don’t do anything to the disk. Better yet, stop "
0674 "using the computer until you have a plan. Sit down and explain you plan to a "
0675 "laymen or better, laywoman. You will be amazed how many stupid ideas you'll "
0676 "discover yourself in such an exercise."
0677 msgstr ""
0678 
0679 #: ../../asset_management/data_protection.rst:222
0680 msgid ""
0681 "If your disk is making weird noises, normal file recovery software isn’t "
0682 "going to work. Do a quick backup if that is going to happen to you. If the "
0683 "drive is still spinning and you can’t find your data, look for a data "
0684 "recovery utility and backup to another computer or drive. An Universal and "
0685 "powerful solution can be to use  `CloneZilla open-source suite <https://en."
0686 "wikipedia.org/wiki/Clonezilla>`_. The important thing is to download them "
0687 "onto another drive, either on another computer, or onto a USB thumb drive or "
0688 "hard disk. It is good practice to save the recovered data to another disk. "
0689 "`dd tool <https://en.wikipedia.org/wiki/Dd_(Unix)>`_ is your friend on Linux "
0690 "systems."
0691 msgstr ""
0692 
0693 #: ../../asset_management/data_protection.rst:225
0694 msgid "Common Myths Dispelled"
0695 msgstr ""
0696 
0697 #: ../../asset_management/data_protection.rst:227
0698 msgid "We would like to dispel some common myths:"
0699 msgstr ""
0700 
0701 #: ../../asset_management/data_protection.rst:229
0702 msgid ""
0703 "Open Source file systems are less prone to data loss than proprietary "
0704 "systems: Wrong, NTFS is rather a tiny notch better than ext4, ReiserFs, JFS, "
0705 "XFS, to name just the most popular file systems that often come as default "
0706 "storage format disk used by distributions."
0707 msgstr ""
0708 
0709 #: ../../asset_management/data_protection.rst:231
0710 msgid ""
0711 "Journalize files systems prevent data corruption/loss: Wrong, they only "
0712 "speed up the scan process in case of a sudden interrupt during operation and "
0713 "prevent ambiguous states. But if a file was not entirely saved before the "
0714 "mishap, it'll be lost."
0715 msgstr ""
0716 
0717 #: ../../asset_management/data_protection.rst:233
0718 msgid ""
0719 "`RAID <https://en.wikipedia.org/wiki/RAID>`_ systems prevent data corruption/"
0720 "loss: Mostly wrong, **RAID 0 and 1** prevent you from nothing, **RAID 5** "
0721 "can prevent data loss due to disk-failures (but not from disk or file system "
0722 "errors). Many low-end RAID controllers (most mother board controllers are) "
0723 "don’t report problems, figuring you’ll never notice. If you do notice, "
0724 "months later, what is the chance that you’ll know it was the controller’s "
0725 "fault? One insidious problem is corruption of **RAID 5** parity data. It is "
0726 "pretty simple to check a file by reading it and matching the metadata. "
0727 "Checking parity data is much more difficult, so you typically won’t see "
0728 "parity errors until a rebuild. Then, of course, it is too late."
0729 msgstr ""
0730 
0731 #: ../../asset_management/data_protection.rst:235
0732 msgid ""
0733 "Viruses are the biggest thread to digital data: Wrong. Theft, and human "
0734 "errors are the primary cause of data loss."
0735 msgstr ""
0736 
0737 #: ../../asset_management/data_protection.rst:238
0738 msgid "Storage Volume Estimation"
0739 msgstr ""
0740 
0741 #: ../../asset_management/data_protection.rst:240
0742 msgid ""
0743 "Digital camera sensors are 1-2 aperture stops away from fundamental physical "
0744 "limitations. What we mean is this: as technology evolves, there is a natural "
0745 "limit to its progress. Sensitivity and noise characteristics for any kind of "
0746 "light sensor are not far from that limit."
0747 msgstr ""
0748 
0749 #: ../../asset_management/data_protection.rst:242
0750 msgid ""
0751 "Today's cameras tend towards 50 mega pixels sensors, although this "
0752 "resolution is already too high for compact cameras and deteriorates the end "
0753 "result. Given the sensor size and quality of optics, 12 mega pixels are "
0754 "optimum for compact cameras. Even DSLR cameras run into their limits at "
0755 "20-24 mega pixels, for higher resolutions one has to go for full frame "
0756 "sensors (24x36mm) or even bigger formats."
0757 msgstr ""
0758 
0759 #: ../../asset_management/data_protection.rst:244
0760 msgid ""
0761 "So, taking into account the manufacturer mega pixel propaganda it seems save "
0762 "to say that the bulk of future cameras will see less than 30 mega pixels. "
0763 "This gives us an estimation for the necessary storage space per photograph "
0764 "in the long run: <40 MB per image. Even if file versioning will be "
0765 "introduced (grouping of variations of a photograph under one file "
0766 "reference), the trend is to implement scripting of changes so that a small "
0767 "overhead will be recorded only and not a whole different image per version. "
0768 "With faster hardware this concept will see it's maturity quite soon."
0769 msgstr ""
0770 
0771 #: ../../asset_management/data_protection.rst:246
0772 msgid ""
0773 "In order to estimate the amount of storage space you have to plan for, "
0774 "simply determine the number of photographs you take per year (easy with :ref:"
0775 "`digiKam's timeline sidebar tab <timeline_view>`) and multiply it by 40 MB. "
0776 "Most users will keep less than 2000 pictures per year which requires less "
0777 "than 80 GB/year. Assuming that you will change your hard disk (or whatever "
0778 "media in the future) every 4-5 years, the natural increase in storage "
0779 "capacity will suffice to keep you afloat."
0780 msgstr ""
0781 
0782 #: ../../asset_management/data_protection.rst:248
0783 msgid ""
0784 "The more ambitious ones out there will need more space, much more maybe. "
0785 "Think of buying a file server, Giga-Ethernet comes integrated into "
0786 "motherboards today and it's a flick to fetch the files over the local "
0787 "network. Speaking about modern mobos: they now the capability to SATA media "
0788 "through an USB connectors. This makes it really a trifle to buy an external "
0789 "SATA drive and hook it up to your machine. 4000 GB drives will hit the "
0790 "market in 2020. These are terrific compact storage containers for backup "
0791 "swapping: keep one drive at home and one somewhere else."
0792 msgstr ""
0793 
0794 #: ../../asset_management/data_protection.rst:251
0795 msgid "Backup and Recover"
0796 msgstr ""
0797 
0798 #: ../../asset_management/data_protection.rst:253
0799 msgid ""
0800 "A 4 TB HDD is not very expensive today. Do not blame anybody else for data "
0801 "loss. 6% of all PCs will suffer an episode of data loss in any given year. "
0802 "Backup your data often according to a plan, and back it up and test the "
0803 "backup before you do anything dramatic like re-installing your OS, changing "
0804 "disks, resizing partitions and so on."
0805 msgstr ""
0806 
0807 #: ../../asset_management/data_protection.rst:256
0808 msgid "Disaster Prevention"
0809 msgstr ""
0810 
0811 #: ../../asset_management/data_protection.rst:258
0812 msgid ""
0813 "Say, you religiously do your backups every day on a external SATA drive. "
0814 "Then comes the day where lightning strikes. Happy you if the external drive "
0815 "was not connected at that moment."
0816 msgstr ""
0817 
0818 #: ../../asset_management/data_protection.rst:260
0819 msgid ""
0820 "Disasters strike locally and destroy a lot. Forget about airplane crashes: "
0821 "fire, water, electricity, kids and theft are dangerous enough to our data. "
0822 "They usually cover a whole room or house."
0823 msgstr ""
0824 
0825 #: ../../asset_management/data_protection.rst:262
0826 msgid ""
0827 "Therefore disaster control means de-localized storage. Move your backups "
0828 "upstairs, next house, to your bureau (and vise versa), whatever."
0829 msgstr ""
0830 
0831 #: ../../asset_management/data_protection.rst:264
0832 msgid ""
0833 "There is another good aspect to the physical separation: as said above, "
0834 "panic is often the cause of destroying data, even the backup data. Having a "
0835 "backup not at hand right away may safe your ass one day."
0836 msgstr ""
0837 
0838 #: ../../asset_management/data_protection.rst:267
0839 msgid "Backup Technicalities"
0840 msgstr ""
0841 
0842 #: ../../asset_management/data_protection.rst:269
0843 msgid ""
0844 "**Full Backup**: A complete backup of all the files being backed up. It is a "
0845 "snapshot without history, it represents a full copy at one point in time."
0846 msgstr ""
0847 
0848 #: ../../asset_management/data_protection.rst:271
0849 msgid ""
0850 "**Differential Backup**: A backup of only the files that have changed since "
0851 "the last full backup. Constitutes a full snapshot of two points in time: the "
0852 "full backup and the last differential one."
0853 msgstr ""
0854 
0855 #: ../../asset_management/data_protection.rst:273
0856 msgid ""
0857 "**Incremental Backup**: A backup of only the files that have changed since "
0858 "last whatever backup. Constitutes multiple snapshots. You can recreate the "
0859 "original state at any point in time such a backup was made. This comes "
0860 "closest to a versioning system except that it is only sampled and not "
0861 "continuous."
0862 msgstr ""
0863 
0864 #: ../../asset_management/data_protection.rst:276
0865 msgid "Backup The Data"
0866 msgstr ""
0867 
0868 #: ../../asset_management/data_protection.rst:278
0869 msgid "The Best practice at all is to backup the data:"
0870 msgstr ""
0871 
0872 #: ../../asset_management/data_protection.rst:280
0873 msgid "Do a **full backup** in a external storage device."
0874 msgstr ""
0875 
0876 #: ../../asset_management/data_protection.rst:282
0877 msgid "Verify its **data integrity** and put it away (disaster control)."
0878 msgstr ""
0879 
0880 #: ../../asset_management/data_protection.rst:284
0881 msgid "Have another storage device for **frequent backups**."
0882 msgstr ""
0883 
0884 #: ../../asset_management/data_protection.rst:286
0885 msgid ""
0886 "**Swap the devices** every other month after having verified data integrity."
0887 msgstr ""
0888 
0889 #: ../../asset_management/data_protection.rst:289
0890 msgid "A Useful Tool to Backups"
0891 msgstr ""
0892 
0893 #: ../../asset_management/data_protection.rst:291
0894 msgid ""
0895 "Linux `rsync <https://en.wikipedia.org/wiki/Rsync>`_ is a wonderful little "
0896 "utility that's amazingly easy to set up on your machines. Rather than have a "
0897 "scripted FTP session, or some other form of file transfer script - rsync "
0898 "copies only the differences of files that have actually changed, compressed "
0899 "and through ssh if you want to for security. That's a mouthful."
0900 msgstr ""
0901 
0902 #: ../../asset_management/data_protection.rst:293
0903 msgid "A reasonable backup approach for images could be this one:"
0904 msgstr ""
0905 
0906 #: ../../asset_management/data_protection.rst:295
0907 msgid ""
0908 "Backup important images right away (after dumping them to a computer) to "
0909 "optical media."
0910 msgstr ""
0911 
0912 #: ../../asset_management/data_protection.rst:297
0913 msgid "Do daily incremental backup of the work space."
0914 msgstr ""
0915 
0916 #: ../../asset_management/data_protection.rst:299
0917 msgid ""
0918 "Do a weekly differential backup and delete integral backups of week-2 (two "
0919 "weeks ago)."
0920 msgstr ""
0921 
0922 #: ../../asset_management/data_protection.rst:301
0923 msgid "Do a monthly differential backup and delete backup of month-2."
0924 msgstr ""
0925 
0926 #: ../../asset_management/data_protection.rst:303
0927 msgid ""
0928 "If not physically separated already, separate it now (swapping-in another "
0929 "backup drive)."
0930 msgstr ""
0931 
0932 #: ../../asset_management/data_protection.rst:305
0933 msgid ""
0934 "This protocol tries to leave you enough time to spot losses and to recover "
0935 "fully at the same time keeping the backup volume at <130% of the working "
0936 "space. You end up with a daily version of the last 7-14 days, a weekly "
0937 "snapshot for at least one month, and a snapshot of every month. Any more "
0938 "thinning should be done by hand after a full verification. Preserve your "
0939 "images through the changes of technology and owners"
0940 msgstr ""
0941 
0942 #: ../../asset_management/data_protection.rst:308
0943 msgid ""
0944 "In order for your valuable images to **survive the next 40 years** or so "
0945 "(because that's about the time that you will become really interested to "
0946 "revisit those nice old photographs of you as a child, adolescent etc.) there "
0947 "are two strategies to be observed:"
0948 msgstr ""
0949 
0950 #: ../../asset_management/data_protection.rst:310
0951 msgid ""
0952 "**Keep up with technology**, don't lag behind more than a couple of years."
0953 msgstr ""
0954 
0955 #: ../../asset_management/data_protection.rst:312
0956 msgid "Save your photos in an open, **non-proprietary standard**."
0957 msgstr ""
0958 
0959 #: ../../asset_management/data_protection.rst:315
0960 msgid "Keep Up With Technology"
0961 msgstr ""
0962 
0963 #: ../../asset_management/data_protection.rst:317
0964 msgid ""
0965 "As the future is unforeseeable by nature, everything said today is to be "
0966 "taken with caution, and to be reviewed as we advance. Unfortunately there is "
0967 "no shortcut possible to some basic vigilance. Every 5-8 years at least one "
0968 "should ask oneself the question of backwards compatibility of current "
0969 "systems. The less variants we used in the past the less questions are to be "
0970 "answered in the future."
0971 msgstr ""
0972 
0973 #: ../../asset_management/data_protection.rst:319
0974 msgid ""
0975 "Of course every time you change your computer system (machine, operating "
0976 "system, applications, DRM) you have to ask yourself the same questions. "
0977 "Today, if you want to switch to Windows, you have to ask yourself three "
0978 "times if you still can import your pictures, and, more important so, if you "
0979 "are ever able to move them onto some other system or machine. Chances are "
0980 "good that you cannot. We see many people struggling around us, because "
0981 "Windows enforces a strict DRM regime. How can you proof to Windows that you "
0982 "are actually the owner of your pictures copyright?"
0983 msgstr ""
0984 
0985 #: ../../asset_management/data_protection.rst:321
0986 msgid ""
0987 "Basically the questions should be answered along the line explained in this "
0988 "document: use and change to open standards supported by a manifold of "
0989 "applications."
0990 msgstr ""
0991 
0992 #: ../../asset_management/data_protection.rst:323
0993 msgid ""
0994 "Virtualization becomes available now for everybody. So if you have an old "
0995 "system that is important for reading your images, keep it, install it as a "
0996 "virtual machine for later."
0997 msgstr ""
0998 
0999 #: ../../asset_management/data_protection.rst:325
1000 msgid ""
1001 "Otherwise the advice is quite simple: every time you change your computer "
1002 "architecture, your storage and backup technology, your file format, check it "
1003 "out, go through your library and convert to a newer standard if necessary. "
1004 "And keep to open standards."
1005 msgstr ""
1006 
1007 #: ../../asset_management/data_protection.rst:328
1008 msgid "Scalability"
1009 msgstr ""
1010 
1011 #: ../../asset_management/data_protection.rst:330
1012 msgid ""
1013 "Scalability is the tech-geek expression of the (easy) capability of a system "
1014 "to be resized, which always means up-sized."
1015 msgstr ""
1016 
1017 #: ../../asset_management/data_protection.rst:332
1018 msgid ""
1019 "Lets assume you planned for scalability and dedicated the container you want "
1020 "to increase to a separate disk or partition. On Linux system you then can "
1021 "copy and resize the container to the new disk."
1022 msgstr ""
1023 
1024 #: ../../asset_management/data_protection.rst:337
1025 msgid "Use Open File Formats"
1026 msgstr ""
1027 
1028 #: ../../asset_management/data_protection.rst:339
1029 msgid ""
1030 "The short history of the digital era in the past 20 years has proven over "
1031 "and over again that proprietary formats are not the way to go when you want "
1032 "your data to be intelligible 10 years into the future. Microsoft is "
1033 "certainly the well known culprit of that sort because of its domineering "
1034 "market share. But other companies are actually (if inadvertently) worse "
1035 "since they may not stay long enough in the market at all or have a small "
1036 "user/contributor base only. In the case of Microsoft one has at least the "
1037 "advantage of many people sharing the same problems. Finding a solution has "
1038 "therefore much more success. Still, in some cases Microsoft is using Open "
1039 "Source documentation to understand their own systems, so badly maintained "
1040 "have been their own documentation. Usually with any given MSoffice suite one "
1041 "cannot properly read a document created with the same application two major "
1042 "versions earlier."
1043 msgstr ""
1044 
1045 #: ../../asset_management/data_protection.rst:341
1046 msgid ""
1047 "Image formats have had a longer live time than office documents and are a "
1048 "bit less affected by obsolescence."
1049 msgstr ""
1050 
1051 #: ../../asset_management/data_protection.rst:343
1052 msgid ""
1053 "Open Source standards have the huge advantage of having an open "
1054 "specification. Even if one day in the future there'll be no software to read "
1055 "it anymore, one can recreate such software, a task becoming simpler every "
1056 "year."
1057 msgstr ""
1058 
1059 #: ../../asset_management/data_protection.rst:349
1060 msgid "digiKam Image Editor Default Save Settings For Common Image Formats"
1061 msgstr ""
1062 
1063 #: ../../asset_management/data_protection.rst:351
1064 msgid ""
1065 "**JPEG** has been around for a while now, and whilst it's a lossy format "
1066 "losing a bit every time you make a modification and save it, it is "
1067 "ubiquitous, supports JFIF, Exif, IPTC and XMP metadata, has good compression "
1068 "ratios and can be read by all imaging software. Because of its metadata "
1069 "limitation, lossy nature, absence of transparency and 8 bit color channel "
1070 "depth, we do not recommend it. JPEG2000 is better, can be employed lossless, "
1071 "but lacks in user base."
1072 msgstr ""
1073 
1074 #: ../../asset_management/data_protection.rst:353
1075 msgid ""
1076 "**GIF** is a proprietary. patented format and slowly disappearing from the "
1077 "market. Don't use it."
1078 msgstr ""
1079 
1080 #: ../../asset_management/data_protection.rst:355
1081 msgid ""
1082 "**PNG** has been invented as a Open Source standard to replace GIF, but it "
1083 "does much more. It is lossless, supports XMP, Exif and IPTC metadata, 16 bit "
1084 "color encoding and full transparency. PNG can store gamma and chromaticity "
1085 "data for improved color matching on heterogeneous platforms. Its drawback "
1086 "are a relatively big footprints (but smaller than TIFF) and slow "
1087 "compression. We recommend it."
1088 msgstr ""
1089 
1090 #: ../../asset_management/data_protection.rst:357
1091 msgid ""
1092 "**TIFF** has been widely accepted as an image format. TIFF can exist in "
1093 "uncompressed form or in a container using a lossless compression algorithm "
1094 "(Deflate). It maintains high image quality but at the expense of much larger "
1095 "file sizes. Some cameras let you save your images in this format. The "
1096 "problem is that the format has been altered by so many people that there are "
1097 "now 50 or more flavors and not all are recognizable by all applications."
1098 msgstr ""
1099 
1100 #: ../../asset_management/data_protection.rst:359
1101 msgid ""
1102 "**PGF** for Progressive Graphics File is another not so known but open file "
1103 "image format. Wavelet-based, it allows lossless and lossy data compression. "
1104 "PGF compares well with **JPEG 2000** but it was developed for speed "
1105 "(compression/decompression) rather than to be the best at compression ratio. "
1106 "At the same file size a PGF file looks significantly better than a JPEG one, "
1107 "while remaining very good at progressive display too. PGF format is used "
1108 "internally in digiKam to store compressed thumbnails in the database. For "
1109 "more information about the PGF format see the `libPGF homepage <https://"
1110 "libpgf.org/>`_"
1111 msgstr ""
1112 
1113 #: ../../asset_management/data_protection.rst:365
1114 msgid "digiKam Image Editor Raw Import Tool"
1115 msgstr ""
1116 
1117 #: ../../asset_management/data_protection.rst:367
1118 msgid ""
1119 "**RAW** format. Some, typically more expensive, cameras support RAW format "
1120 "shooting. The RAW format is not really an image standard at all, it is a "
1121 "container format which is different for every brand and camera model. RAW "
1122 "format images contain minimally processed data from the image sensor of a "
1123 "digital camera or image scanner. Raw image files are sometimes called "
1124 "digital negatives, as they fulfill the same role as film negatives in "
1125 "traditional chemical photography: that is, the negative is not directly "
1126 "usable as an image, but has all of the information needed to create an "
1127 "image. Storing photographs in a camera's RAW format provides for higher "
1128 "dynamic range and allows you to alter settings, such as white balance, after "
1129 "the photograph has been taken. Most professional photographers use RAW "
1130 "format, because it offers them maximum flexibility. The downside is that RAW "
1131 "image files can be very large indeed."
1132 msgstr ""
1133 
1134 #: ../../asset_management/data_protection.rst:369
1135 msgid ""
1136 "We recommend clearly to **abstain from archiving in RAW format** (as opposed "
1137 "to shooting in RAW format, which we recommend). It has all bad ingredients: "
1138 "many varieties and proprietary nature. It is clear that in a few years time "
1139 "you cannot use your old RAW files anymore. We have already seen people "
1140 "changing camera, losing their color profiles and having great difficulty to "
1141 "treat their old RAW files correctly. Better change to DNG format."
1142 msgstr ""
1143 
1144 #: ../../asset_management/data_protection.rst:371
1145 msgid ""
1146 "**DNG** or Digital Negative file format is a royalty free and open RAW image "
1147 "format designed by Adobe Systems. DNG was a response to demand for a "
1148 "unifying camera raw file format. It is based on the TIFF/EP format, and "
1149 "mandates use of metadata. A handful of camera manufacturers have adopted DNG "
1150 "already, let's hope that the main contenders Canon and Nikon will use it one "
1151 "day. `Apple ProRAW <https://support.apple.com/en-us/HT211965>`_ format "
1152 "available since the iPhone 12 Pro Max is based on DNG."
1153 msgstr ""
1154 
1155 #: ../../asset_management/data_protection.rst:377
1156 msgid ""
1157 "digiKam Provide a Tool to Convert in Batch RAW to DNG in :ref:`Batch Queue "
1158 "Manager <dng_converter>`"
1159 msgstr ""
1160 
1161 #: ../../asset_management/data_protection.rst:379
1162 msgid ""
1163 "We strongly recommend converting RAW files to DNG for archiving. Despite the "
1164 "fact that DNG was created by Adobe, it is an open standard and widely "
1165 "embraced by the Open Source community (which is usually a good indicator of "
1166 "perennial properties). Some manufacturers have already adopted DNG as RAW "
1167 "format. And last not least, Adobe is the most important source of graphical "
1168 "software today, and they of course support their own invention. It is an "
1169 "ideal archival format, the raw sensor data will be preserved as such in TIFF "
1170 "format inside DNG, so that the risk associated with proprietary RAW formats "
1171 "is alleviated. All of this makes migration to another operating system a no-"
1172 "brainer."
1173 msgstr ""
1174 
1175 #: ../../asset_management/data_protection.rst:385
1176 msgid ""
1177 "digiKam Provide Tools to Convert RAW to DNG during :ref:`Download from "
1178 "Camera <camera_dngconvert>`"
1179 msgstr ""
1180 
1181 #: ../../asset_management/data_protection.rst:387
1182 msgid ""
1183 "**XML** for Extensible Mark-up Language or **RDF** for Resource Description "
1184 "Framework. XML is like HTML, but where HTML is mostly concerned with the "
1185 "presentation of data, XML is concerned with the *representation* of data. On "
1186 "top of that, XML is non-proprietary, operating-system-independent, fairly "
1187 "simple to interpret, text-based and cheap. RDF is the WC3's solution to "
1188 "integrate a variety of different applications such as library catalogs, "
1189 "world-wide directories, news feeds, software, as well as collections of "
1190 "music, images, and events using XML as an interchange syntax. Together the "
1191 "specifications provide a method that uses a lightweight ontology based on "
1192 "the Dublin Core which also supports the \"Semantic Web\" (easy exchange of "
1193 "knowledge on the Web)."
1194 msgstr ""
1195 
1196 #: ../../asset_management/data_protection.rst:390
1197 msgid "IPTC Goes XMP"
1198 msgstr ""
1199 
1200 #: ../../asset_management/data_protection.rst:392
1201 msgid ""
1202 "That's probably one of the reasons why, around 2001, that Adobe introduced "
1203 "its XML based XMP technology to replace the *Image Resource Block* "
1204 "technology of the nineties. XMP stands for **Extensible Metadata Platform**, "
1205 "a mixture of XML and RDF. It is a labeling technology that lets users embed "
1206 "data about a file in the file itself, the file info is saved using the "
1207 "extension :file:`*.xmp*` (signifying the use of XML/RDF)."
1208 msgstr ""
1209 
1210 #: ../../asset_management/data_protection.rst:394
1211 msgid ""
1212 "`XMP <https://en.wikipedia.org/wiki/Extensible_Metadata_Platform>`_: As much "
1213 "as ODF will be readable forever (since its containing text is written in "
1214 "clear text), XMP will preserve your metadata in a clearly understandable "
1215 "format XML. No danger here of not being able to read it later. It can be "
1216 "embedded into the image files or as a separate accompanying file "
1217 "(**Sidecar** concept). XMP can be used in PDF, JPEG, JPEG2000, GIF, PNG, "
1218 "HTML, TIFF, Adobe Illustrator, PSD, Postscript, Encapsulated Postscript, and "
1219 "video files. In a typical edited JPEG file, XMP information is typically "
1220 "included alongside Exif and IPTC data."
1221 msgstr ""
1222 
1223 #: ../../asset_management/data_protection.rst:400
1224 msgid "digiKam can display XMP Contents from Image and Video"
1225 msgstr ""
1226 
1227 #: ../../asset_management/data_protection.rst:402
1228 msgid ""
1229 "Embedding metadata in files allows easy sharing and transfer of files across "
1230 "products, vendors, platforms, customers, without metadata getting lost. The "
1231 "most common metadata tags recorded in XMP data are those from the Dublin "
1232 "Core Metadata Initiative, which include things like title, description, "
1233 "creator, and so on. The standard is designed to be extensible, allowing "
1234 "users to add their own custom types of metadata into the XMP data. XMP "
1235 "generally does not allow binary data types to be embedded. This means that "
1236 "any binary data one wants to carry in XMP, such as thumbnail images, must be "
1237 "encoded in some XML-friendly format, such as Base-64."
1238 msgstr ""
1239 
1240 #: ../../asset_management/data_protection.rst:404
1241 msgid ""
1242 "Many photographers prefer keeping an original of their shots (mostly RAW) "
1243 "for the archive. XMP suits that approach as it keeps metadata separate from "
1244 "the image file. We do not share this point of view. There could be problems "
1245 "linking metadata file and image file, and as said above, RAW formats will "
1246 "become obsolete. We recommend using DNG as a container and putting "
1247 "everything inside."
1248 msgstr ""
1249 
1250 #: ../../asset_management/data_protection.rst:406
1251 msgid ""
1252 "The `Dublin Core Metadata Initiative <https://www.dublincore.org/>`_ is an "
1253 "open organization engaged in the development of interoperable online "
1254 "metadata standards that support a broad range of purposes and business "
1255 "models. DCMI's activities include work on architecture and modeling, "
1256 "discussions and collaborative work in DCMI Communities and DCMI Task Groups, "
1257 "annual conferences and workshops, standards liaison, and educational efforts "
1258 "to promote widespread acceptance of metadata standards and practices."
1259 msgstr ""
1260 
1261 #: ../../asset_management/data_protection.rst:412
1262 msgid "digiKam Support Sidecar Files With many Options From Settings Panel"
1263 msgstr ""
1264 
1265 #: ../../asset_management/data_protection.rst:415
1266 msgid "Protect Your Data"
1267 msgstr ""
1268 
1269 #: ../../asset_management/data_protection.rst:417
1270 msgid "Use surge protectors (UL 1449 standard), possibly combined with a UPS."
1271 msgstr ""
1272 
1273 #: ../../asset_management/data_protection.rst:419
1274 msgid ""
1275 "Use ECC memory to verify correct data transmission (even just saving files)."
1276 msgstr ""
1277 
1278 #: ../../asset_management/data_protection.rst:421
1279 msgid "Watch your hard drives (temperature, noise...), make backups."
1280 msgstr ""
1281 
1282 #: ../../asset_management/data_protection.rst:423
1283 msgid "Keep backups at another location, locked up, use web storage space."
1284 msgstr ""
1285 
1286 #: ../../asset_management/data_protection.rst:425
1287 msgid "Use archival media and burners."
1288 msgstr ""
1289 
1290 #: ../../asset_management/data_protection.rst:427
1291 msgid ""
1292 "Don't panic in case of data loss, explain your recovery plan to a layperson."
1293 msgstr ""
1294 
1295 #: ../../asset_management/data_protection.rst:429
1296 msgid ""
1297 "Choose you file system, partitions, folders to cater for easy scalability."
1298 msgstr ""
1299 
1300 #: ../../asset_management/data_protection.rst:431
1301 msgid "Use open, non-proprietary standards to manage and save photographs."
1302 msgstr ""
1303 
1304 #: ../../asset_management/data_protection.rst:433
1305 msgid "Do a technology/migration review at least every 5 years."
1306 msgstr ""