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0001 # German translations for Digikam Manual package.
0002 # Copyright (C) licensed under the  <a href="https://creativecommons.org/licenses/by-sa/4.0/">Creative Commons License SA 4.0</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: 2023-01-01 12:31+0100\n"
0012 "Last-Translator: Automatically generated\n"
0013 "Language-Team: none\n"
0014 "Language: de\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=2; plural=(n != 1);\n"
0019 
0020 #: ../../asset_management/data_protection.rst:1
0021 msgid "Protect Your Images from Data Corruption and Loss"
0022 msgstr ""
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 ""
0039 
0040 #: ../../asset_management/data_protection.rst:16
0041 msgid "Contents"
0042 msgstr ""
0043 
0044 #: ../../asset_management/data_protection.rst:19
0045 msgid "Main Factors of Digital Data Loss"
0046 msgstr ""
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 
0061 #: ../../asset_management/data_protection.rst:25
0062 msgid ""
0063 "The physical deterioration of the media (all media deteriorate at different "
0064 "time scales)."
0065 msgstr ""
0066 
0067 #: ../../asset_management/data_protection.rst:27
0068 msgid "Undetected transmission errors during data transfer."
0069 msgstr ""
0070 
0071 #: ../../asset_management/data_protection.rst:29
0072 msgid ""
0073 "The lack of support for long-date, undoubtedly proprietary, digital formats."
0074 msgstr ""
0075 
0076 #: ../../asset_management/data_protection.rst:31
0077 msgid "Ancient hardware."
0078 msgstr ""
0079 
0080 #: ../../asset_management/data_protection.rst:33
0081 msgid ""
0082 "Kroll Ontrack, the worlds largest data recovery firm, have some interesting "
0083 "statistics on what actually causes data loss."
0084 msgstr ""
0085 
0086 #: ../../asset_management/data_protection.rst:36
0087 msgid "Cause of data loss"
0088 msgstr ""
0089 
0090 #: ../../asset_management/data_protection.rst:36
0091 msgid "Perception"
0092 msgstr ""
0093 
0094 #: ../../asset_management/data_protection.rst:36
0095 msgid "Reality"
0096 msgstr ""
0097 
0098 #: ../../asset_management/data_protection.rst:38
0099 msgid "Hardware or system problem"
0100 msgstr ""
0101 
0102 #: ../../asset_management/data_protection.rst:38
0103 msgid "78%"
0104 msgstr ""
0105 
0106 #: ../../asset_management/data_protection.rst:38
0107 msgid "56%"
0108 msgstr ""
0109 
0110 #: ../../asset_management/data_protection.rst:39
0111 msgid "Human error"
0112 msgstr ""
0113 
0114 #: ../../asset_management/data_protection.rst:39
0115 msgid "11%"
0116 msgstr ""
0117 
0118 #: ../../asset_management/data_protection.rst:39
0119 msgid "26%"
0120 msgstr ""
0121 
0122 #: ../../asset_management/data_protection.rst:40
0123 msgid "Software corruption or problem"
0124 msgstr ""
0125 
0126 #: ../../asset_management/data_protection.rst:40
0127 msgid "7%"
0128 msgstr ""
0129 
0130 #: ../../asset_management/data_protection.rst:40
0131 msgid "9%"
0132 msgstr ""
0133 
0134 #: ../../asset_management/data_protection.rst:41
0135 msgid "Computer viruses"
0136 msgstr ""
0137 
0138 #: ../../asset_management/data_protection.rst:41
0139 msgid "2%"
0140 msgstr ""
0141 
0142 #: ../../asset_management/data_protection.rst:41
0143 msgid "4%"
0144 msgstr ""
0145 
0146 #: ../../asset_management/data_protection.rst:42
0147 msgid "Disaster"
0148 msgstr ""
0149 
0150 #: ../../asset_management/data_protection.rst:42
0151 msgid "1-2%"
0152 msgstr ""
0153 
0154 #: ../../asset_management/data_protection.rst:45
0155 msgid "So let us analyze those cases step by step."
0156 msgstr ""
0157 
0158 #: ../../asset_management/data_protection.rst:50
0159 msgid "Storage Deterioration"
0160 msgstr ""
0161 
0162 #: ../../asset_management/data_protection.rst:52
0163 msgid ""
0164 "Devices listed below are sorted by data speed access feature, from the less "
0165 "faster to the most faster."
0166 msgstr ""
0167 
0168 #: ../../asset_management/data_protection.rst:55
0169 msgid "Magnetic Media"
0170 msgstr ""
0171 
0172 #: ../../asset_management/data_protection.rst:57
0173 msgid ""
0174 "Magnetic tapes are used in backup systems, much more in professional "
0175 "environments than in home use. Tapes have issues with data retention and "
0176 "changing technology, but they are safer in one aspect than optical drives: "
0177 "they are less exposed to scratches and dirt and writing deficiencies. On the "
0178 "other hand they are susceptible to magnetic fields. Throw a magnet next to a "
0179 "tape and it's gone. Tapes should be re-copied every 5-8 years, otherwise too "
0180 "many bits will fail and escape the checksum protection. The downside of "
0181 "magnetic tapes is often the recorder price and the restore time (20x longer "
0182 "than from HDD). Tape backup system have seen their best days."
0183 msgstr ""
0184 
0185 #: ../../asset_management/data_protection.rst:60
0186 msgid "Optical Drives"
0187 msgstr ""
0188 
0189 #: ../../asset_management/data_protection.rst:62
0190 msgid ""
0191 "Physical deterioration of the media happens more rapidly with paper and CD-"
0192 "Rs than the average of film. Yet while film lasts longer (sometimes decades "
0193 "longer) than other forms of media, the right kind of backup of digital media "
0194 "never loses anything. Film decays - digital 1's and 0's do not, and film "
0195 "starts to decay the moment it's created and developed. It will never have "
0196 "the same color, contrast, etc. that it did have a moment before. Digital "
0197 "doesn't do that. However, digital is susceptible to corruption. And yes, "
0198 "physical media such as floppies and magnetic hard drives are also "
0199 "susceptible to the decay of the medium, just like CDs are. They just last "
0200 "longer."
0201 msgstr ""
0202 
0203 #: ../../asset_management/data_protection.rst:64
0204 msgid ""
0205 "To combat the problem of optical drives, they need to be properly cared for "
0206 "and not trusted for more than a few years. Thankfully you can purchase "
0207 "archive-quality CDs and DVDs which last longer, though they are much more "
0208 "difficult to obtain and are much more expensive. There are offers out there "
0209 "for gold-plated optical drive, few euros a piece claiming 100 years storage "
0210 "life (if you care to believe it)."
0211 msgstr ""
0212 
0213 #: ../../asset_management/data_protection.rst:66
0214 msgid ""
0215 "Optical disks may become unreadable, but you can reduce the risk using good "
0216 "disks and a good recorder, and storing them in a correct way. The best "
0217 "optical drive recorders are not much more expensive than the cheapest, but "
0218 "they write in a much more reliable way. It's a matter of choosing the right "
0219 "one."
0220 msgstr ""
0221 
0222 #: ../../asset_management/data_protection.rst:68
0223 msgid ""
0224 "Essentially, optical drives are very prone to errors, even in a freshly "
0225 "written state. That's why they are heavily protected with a checksum "
0226 "mechanism (75% of data are effective data, the rest is formatting and "
0227 "checksum overhead). But even with that massive amount of protection they "
0228 "will suffer deterioration from chemical aging, ultra-violet exposure, "
0229 "scratches, dust, etc."
0230 msgstr ""
0231 
0232 #: ../../asset_management/data_protection.rst:70
0233 msgid ""
0234 "For damaged optical drives, Wikipedia `list all common applications <https://"
0235 "en.wikipedia.org/wiki/Data_recovery#List_of_data_recovery_software>`_ "
0236 "designed to get data from damaged floppies, hard drives, flash media such as "
0237 "camera memory and USB drives, and so forth."
0238 msgstr ""
0239 
0240 #: ../../asset_management/data_protection.rst:72
0241 msgid ""
0242 "Dual-layer optical media Blu-ray disk can store 50 GB, almost six times the "
0243 "capacity of a dual layer DVD at 8.5 GB. Everything that has been said about "
0244 "CDs/DVDs applies to Blu-ray disks as well."
0245 msgstr ""
0246 
0247 #: ../../asset_management/data_protection.rst:74
0248 msgid ""
0249 "Best practice: burn them slowly with a good recorder on archive quality "
0250 "media in an open, non-proprietary format, read the data back to verify, "
0251 "label them with some descriptive text + date & author, lock them away where "
0252 "it is clean, dark, animal safe and dry. And do not forget to copy them over "
0253 "to the next generation of media before you throw away your last piece of "
0254 "hardware or software able to read them."
0255 msgstr ""
0256 
0257 #: ../../asset_management/data_protection.rst:77
0258 msgid "Hard Disks"
0259 msgstr ""
0260 
0261 #: ../../asset_management/data_protection.rst:79
0262 msgid ""
0263 "Hard Disk (HDD) manufacturers keep their statistics to themselves. A "
0264 "manufacturer guaranty buys you a new disk, but no data. Google for One has "
0265 "done a large scale study on `HDD <https://en.wikipedia.org/wiki/"
0266 "Hard_disk_drive>`_ failure mechanisms: `Disk Failures study <https://"
0267 "research.google.com/archive/disk_failures.pdf>`_."
0268 msgstr ""
0269 
0270 #: ../../asset_management/data_protection.rst:81
0271 msgid ""
0272 "In a nutshell: Disks run longest when operating between 35°C and 45°C, at "
0273 "lower temperatures the error rates increases dramatically. Controller parts "
0274 "(electronics) are the foremost sources of failure, SMART does not diagnose "
0275 "any of this. Some `SMART <https://en.wikipedia.org/wiki/Self-Monitoring,"
0276 "_Analysis_and_Reporting_Technology>`_ errors are indicative of imminent "
0277 "failure, in particular scan errors and relocation counts. Lifetime "
0278 "expectancy is 4-5 years."
0279 msgstr ""
0280 
0281 #: ../../asset_management/data_protection.rst:83
0282 msgid ""
0283 "In general and contrary to intuition or ecological considerations, running a "
0284 "hard drive permanently results in a longer lifetime than switching it on and "
0285 "off all the time. It has even been reported that aggressive power management "
0286 "spinning down the drive can harm it quickly. Making it working hard shortens "
0287 "the lifetime somewhat. The worst factors for HDD probably are vibrations, "
0288 "shocks, and cold temperatures."
0289 msgstr ""
0290 
0291 #: ../../asset_management/data_protection.rst:85
0292 msgid ""
0293 "If your disk is making weird noises, normal file recovery software isn’t "
0294 "going to work. Do a quick backup if that is going to happen to you. (Use dd "
0295 "utility if possible, not a normal file backup since dd reads in a smooth, "
0296 "spiraling stream from beginning to end and doesn't stress the mechanics). "
0297 "There are specialist companies that can recover data from otherwise "
0298 "destroyed drive, but they are very expensive."
0299 msgstr ""
0300 
0301 #: ../../asset_management/data_protection.rst:87
0302 msgid ""
0303 "Linux `SmartMonTools <https://en.wikipedia.org/wiki/Smartmontools>`_ suite "
0304 "allows to query the storage hardware devices for future failure. We highly "
0305 "recommend to use this kind of tool on your computer."
0306 msgstr ""
0307 
0308 #: ../../asset_management/data_protection.rst:90
0309 msgid "Solid State Drives"
0310 msgstr ""
0311 
0312 #: ../../asset_management/data_protection.rst:92
0313 msgid ""
0314 "`SSDs <https://en.wikipedia.org/wiki/Solid-state_drive>`_ are mechanically "
0315 "more robust than HDDs and suffer much less on that front when they are "
0316 "plugged into the computer. They will replace HDD in time as capacity, "
0317 "robustest, and price become more and more a good solution as permanent data "
0318 "storage devices."
0319 msgstr ""
0320 
0321 #: ../../asset_management/data_protection.rst:94
0322 msgid ""
0323 "In case of use as external device, one major cause for data loss (often "
0324 "recoverable) is the unsafe removal of SSDs from a computer. Before data is "
0325 "saved from a computer memory to any attached device, it remains for some "
0326 "time in buffers. In hard drives this means seconds at most, whereas with "
0327 "SSDs it can be tens of minutes. Therefore, before you disconnect a flash "
0328 "device, always activate data flushing through software (often called *safely "
0329 "remove device*)."
0330 msgstr ""
0331 
0332 #: ../../asset_management/data_protection.rst:97
0333 msgid "Non-Volatile Memory"
0334 msgstr ""
0335 
0336 #: ../../asset_management/data_protection.rst:99
0337 msgid ""
0338 "`NVM Express (NVMe) <https://en.wikipedia.org/wiki/NVMe>`_ for Non-Volatile "
0339 "Memory is a logical-device interface for accessing a computer's non-volatile "
0340 "storage media attached PCI Express (PCIe) bus. It use same very fast NAND "
0341 "flash memory used in SSDs, but use the M.2 cards interface instead the "
0342 "slower mSATA used with older HDDs."
0343 msgstr ""
0344 
0345 #: ../../asset_management/data_protection.rst:101
0346 msgid ""
0347 "NVMe allows host hardware and software to fully exploit the levels of "
0348 "parallelism possible in modern SSDs. NVMe reduces I/O overhead and brings "
0349 "various performance improvements relative to previous SSDs. mSATA interface "
0350 "protocols were developed for use with far slower HDDs where a very lengthy "
0351 "delay exists between a request and data transfer, where data speeds are much "
0352 "slower than RAM speeds."
0353 msgstr ""
0354 
0355 #: ../../asset_management/data_protection.rst:103
0356 msgid ""
0357 "For a viability viewpoint, as NVMe devices uses the same hardware than SSDs "
0358 "to store data, the robustness must be the same."
0359 msgstr ""
0360 
0361 #: ../../asset_management/data_protection.rst:107
0362 msgid ""
0363 "**In all cases SSDs or NVMe as internal devices are the more modern and "
0364 "efficient solution to host the digiKam databases and the collections.**"
0365 msgstr ""
0366 
0367 #: ../../asset_management/data_protection.rst:110
0368 msgid "Power Supply Failures"
0369 msgstr ""
0370 
0371 #: ../../asset_management/data_protection.rst:113
0372 msgid "Power Surges"
0373 msgstr ""
0374 
0375 #: ../../asset_management/data_protection.rst:115
0376 msgid ""
0377 "As much as 1% of all computers are affected by lightning and power surges "
0378 "every year."
0379 msgstr ""
0380 
0381 #: ../../asset_management/data_protection.rst:117
0382 msgid ""
0383 "This is about total data loss due to power surges. Of course you can have "
0384 "the occasional data loss due to power loss before saving files. But those "
0385 "losses can normally be restored without major difficulty."
0386 msgstr ""
0387 
0388 #: ../../asset_management/data_protection.rst:119
0389 msgid ""
0390 "You don’t have to wait for the next thunderstorm to be concerned about how a "
0391 "sudden fluctuation in electric power may affect your computer system. Recent "
0392 "statistics have shown that as much as 63 percent of all electronics "
0393 "casualties are due to power problems, and most computers are subject to two "
0394 "or more power anomalies a day. Since power surges or blackouts can occur "
0395 "anywhere and at any time, it only makes sense to protect your computer by "
0396 "investing in some sort of surge protection device."
0397 msgstr ""
0398 
0399 #: ../../asset_management/data_protection.rst:122
0400 msgid "How Surges Happen"
0401 msgstr ""
0402 
0403 #: ../../asset_management/data_protection.rst:124
0404 msgid ""
0405 "A power surge occurs when the power line voltage increases over nominal "
0406 "values for more than 10 milliseconds. Sixty percent of all power surges are "
0407 "caused from within the home or office, generally when a device with a motor "
0408 "(such as a hair dryer, refrigerator, or water pump) shuts off and the power "
0409 "it was using is diverted elsewhere as excess voltage. The remaining 40 "
0410 "percent of power surges are generated by factors such as lightning, utility "
0411 "grid switching, line slapping, poor wiring, and so on."
0412 msgstr ""
0413 
0414 #: ../../asset_management/data_protection.rst:126
0415 msgid ""
0416 "While most average electricity-using devices are not affected by power "
0417 "surges, devices relying on computer chips and high-speed microprocessors are "
0418 "susceptible to serious damage. For your computer, power anomalies can result "
0419 "in keyboard lockup, complete data loss, hardware degradation, damaged "
0420 "motherboards, and more. Failure to protect yourself from the inevitable can "
0421 "result in a loss of both time and money."
0422 msgstr ""
0423 
0424 #: ../../asset_management/data_protection.rst:129
0425 msgid "Surge Protectors"
0426 msgstr ""
0427 
0428 #: ../../asset_management/data_protection.rst:131
0429 msgid ""
0430 "The most common defense against power surges is a surge protector or "
0431 "suppressor, a device that works by absorbing some of the excess energy and "
0432 "diverting the rest of it to the ground. These are usually found in the form "
0433 "of a power strip (one of those long devices that have six or so outlets and "
0434 "a single, grounded plug). Bear in mind, however, that not every power strip "
0435 "serves as a surge protector."
0436 msgstr ""
0437 
0438 #: ../../asset_management/data_protection.rst:133
0439 msgid ""
0440 "When selecting your surge protector, you want to be sure it is listed as "
0441 "meeting the UL 1449 standard, which guarantees a certain minimum of "
0442 "protection. You should also look for one that offers protection against "
0443 "lightning (not every one does) and provides insurance for equipment that is "
0444 "properly attached."
0445 msgstr ""
0446 
0447 #: ../../asset_management/data_protection.rst:135
0448 msgid ""
0449 "Because a power surge can follow any path to your computer, be sure that "
0450 "each peripheral connected to your system is protected. This includes your "
0451 "phone line or cable modem, as power can surge through these routes as well. "
0452 "A number of manufacturers are now producing surge suppressors that feature a "
0453 "phone jack for your modem along with the electrical outlets, while others "
0454 "have coaxial cable jacks for those who use a cable modem or TV tuner card."
0455 msgstr ""
0456 
0457 #: ../../asset_management/data_protection.rst:137
0458 msgid ""
0459 "If you have a notebook computer, you will want to carry a surge suppressor "
0460 "as well. A variety of suppressors designed specifically for notebooks are "
0461 "available, small in size and possessing both electric and phone outlets that "
0462 "make them ideal for use on the road."
0463 msgstr ""
0464 
0465 #: ../../asset_management/data_protection.rst:140
0466 msgid "Uninterruptible Power Supply"
0467 msgstr ""
0468 
0469 #: ../../asset_management/data_protection.rst:142
0470 msgid ""
0471 "While a surge suppressor will protect your system from minor fluctuations in "
0472 "the power lines, it won’t help you if the power should black out completely. "
0473 "Even an outage of just a few seconds can result in the loss of valuable "
0474 "data, so you might find it worthwhile to invest in an **Uninterruptible "
0475 "Power Supply** (UPS)."
0476 msgstr ""
0477 
0478 #: ../../asset_management/data_protection.rst:144
0479 msgid ""
0480 "Besides serving as surge suppressors, these devices automatically switch to "
0481 "battery power when a power outage occurs, giving you the opportunity to save "
0482 "data and shut down your system. Some models will even allow you to keep "
0483 "working until power is restored. When purchasing a UPS, be sure that it has "
0484 "the same qualities that you would seek in a surge suppressor, but also check "
0485 "out the battery life and included software."
0486 msgstr ""
0487 
0488 #: ../../asset_management/data_protection.rst:146
0489 msgid ""
0490 "Considering the potential risk to your computing system, ensuring its safety "
0491 "from power disturbances is a worthwhile investment. A quality surge "
0492 "suppressor or a 500W UPS are not too expensive for the peace of mind you’ll "
0493 "gain knowing your computer is well protected. In the very least pull all "
0494 "lines to your computer when you go on holidays."
0495 msgstr ""
0496 
0497 #: ../../asset_management/data_protection.rst:149
0498 msgid "Safeguarding Policy"
0499 msgstr ""
0500 
0501 #: ../../asset_management/data_protection.rst:152
0502 msgid "Web Storage Services"
0503 msgstr ""
0504 
0505 #: ../../asset_management/data_protection.rst:154
0506 msgid ""
0507 "Amazon Web Services includes S3 - Simple Storage Service. With appropriate "
0508 "configuration, you can mount S3 as a drive on Linux, Mac, and Windows "
0509 "systems, allowing you to use it as a backup destination for your favorite "
0510 "software. Google Shared Storage is another popular offer where one can store "
0511 "infinite amount of data."
0512 msgstr ""
0513 
0514 #: ../../asset_management/data_protection.rst:156
0515 msgid ""
0516 "It is expensive compared to hard drives at home. And you have to transfer "
0517 "the images over the (a comparatively slow) Internet."
0518 msgstr ""
0519 
0520 #: ../../asset_management/data_protection.rst:158
0521 msgid ""
0522 "We think as a safeguard against localized data loss of the most essential "
0523 "images it's not a bad idea at all, but it is not a general backup solution, "
0524 "much too slow for that."
0525 msgstr ""
0526 
0527 #: ../../asset_management/data_protection.rst:160
0528 msgid ""
0529 "Google Photo, and Flickr provide online storage services specialist on "
0530 "photographie. Their free space is limited and you don't want to have full "
0531 "resolution images online. But the pro-accounts offer more."
0532 msgstr ""
0533 
0534 #: ../../asset_management/data_protection.rst:162
0535 msgid ""
0536 "In terms of data retention the web space solution is probably pretty safe. "
0537 "Transmission errors are corrected (thanks to the TCP protocol) and the big "
0538 "companies usually have backup included plus distributed storage so that they "
0539 "are disaster proof within themselves."
0540 msgstr ""
0541 
0542 #: ../../asset_management/data_protection.rst:168
0543 msgid "digiKam Provide a Tool to Export Items to iNaturalist Web Service"
0544 msgstr ""
0545 
0546 #: ../../asset_management/data_protection.rst:171
0547 msgid "Transmission Errors"
0548 msgstr ""
0549 
0550 #: ../../asset_management/data_protection.rst:173
0551 msgid ""
0552 "Data does not only get lost from storage devices, it also gets lost when "
0553 "traveling inside the computer or across networks (although the network "
0554 "traffic itself via TCP is error protected). Errors occur on buses and in "
0555 "memory spaces. Consumer hardware has no protection against those bit errors, "
0556 "whereas it is worthwhile to look into such. You can buy ECC (error code "
0557 "correction) protected memory (which is expensive, granted). With `ECC RAM "
0558 "<https://en.wikipedia.org/wiki/ECC_memory>`_ at least the memory will be "
0559 "scrubbed for single bit errors and corrected. Double bit errors would escape "
0560 "that scheme but they occur too infrequently."
0561 msgstr ""
0562 
0563 #: ../../asset_management/data_protection.rst:179
0564 msgid "The Data Workflow Between Application and Storage Media"
0565 msgstr ""
0566 
0567 #: ../../asset_management/data_protection.rst:181
0568 msgid ""
0569 "This diagram depicts the transmission chain elements in a computer, all "
0570 "transitions are susceptible to transmission errors. The Linux `ZFS <https://"
0571 "en.wikipedia.org/wiki/ZFS>`_ and `BTRFS <https://en.wikipedia.org/wiki/"
0572 "Btrfs>`_ file system at least ensure the OS to disk path of data integrity "
0573 "under Linux."
0574 msgstr ""
0575 
0576 #: ../../asset_management/data_protection.rst:183
0577 msgid ""
0578 "The Byte Error Rate (BER) for memory and transmission channels is in the "
0579 "order of 1 in 10 Million (10E-7 bit). That just means that 1 in 3000 images "
0580 "has an error only due to transmission problems. Now how dramatic that is for "
0581 "an image is left to chance, it could mean that the image is destroyed or "
0582 "that a pixel somewhere changed its value, due to the compression used on "
0583 "almost all images one cannot predict the gravity of a single bit error "
0584 "impact. Often one sees some partial images instead of the full image."
0585 msgstr ""
0586 
0587 #: ../../asset_management/data_protection.rst:185
0588 msgid ""
0589 "The worst of all that is that nobody tells you when a transmission error "
0590 "occurs, not your hardware. All those glitches go down unheard until one day "
0591 "you open the photograph, and to your surprise it's broken. It is quite "
0592 "worrisome that there should be no protection within a computer, nobody seems "
0593 "to have thought of it. The Internet (TCP protocol) is much saver as a data "
0594 "path than inside a computer."
0595 msgstr ""
0596 
0597 #: ../../asset_management/data_protection.rst:187
0598 msgid ""
0599 "Flaky power supplies are another source of transmission losses because they "
0600 "create interference with the data streams. With normal files systems those "
0601 "errors go unnoticed."
0602 msgstr ""
0603 
0604 #: ../../asset_management/data_protection.rst:193
0605 msgid "The Storage Media Number of Failure Per Year"
0606 msgstr ""
0607 
0608 #: ../../asset_management/data_protection.rst:195
0609 msgid ""
0610 "Even if you are not overly concerned today with transmission problems, have "
0611 "a look into the future at illustration. Already in 2010 we'll see thousands "
0612 "of errors per year."
0613 msgstr ""
0614 
0615 #: ../../asset_management/data_protection.rst:198
0616 msgid "Future of File-systems"
0617 msgstr ""
0618 
0619 #: ../../asset_management/data_protection.rst:200
0620 msgid ""
0621 "`ZFS <https://en.wikipedia.org/wiki/ZFS>`_ from Oracle seems to be one of "
0622 "two candidates to deal with disk errors on a low level, and it is highly "
0623 "scalable. It is Open Source, heavily patented, comes with an GPL "
0624 "incompatible license, and is available on Linux and macOS."
0625 msgstr ""
0626 
0627 #: ../../asset_management/data_protection.rst:202
0628 msgid ""
0629 "Oracle has also started an initiative with its `BTRFS <https://en.wikipedia."
0630 "org/wiki/Btrfs>`_ file system. It employs the same protection technique as "
0631 "**ZFS** does, and it's available on Linux."
0632 msgstr ""
0633 
0634 #: ../../asset_management/data_protection.rst:205
0635 msgid "Human Errors"
0636 msgstr ""
0637 
0638 #: ../../asset_management/data_protection.rst:208
0639 msgid "Theft And Accidents"
0640 msgstr ""
0641 
0642 #: ../../asset_management/data_protection.rst:210
0643 msgid ""
0644 "Do not underestimate it. Those two factor account for 86% of notebook and "
0645 "46% for desktop system data losses. For notebooks, theft counts for 50% "
0646 "alone."
0647 msgstr ""
0648 
0649 #: ../../asset_management/data_protection.rst:213
0650 msgid "Malware"
0651 msgstr ""
0652 
0653 #: ../../asset_management/data_protection.rst:215
0654 msgid ""
0655 "Data loss due to viruses is less grave than common wisdom make you believe. "
0656 "It accounts for less damage than theft or re-installations, for example. And "
0657 "it is limited to Microsoft OS users. Apple users experience very few viruses "
0658 "and under Linux they haven't been around for quite some time now."
0659 msgstr ""
0660 
0661 #: ../../asset_management/data_protection.rst:218
0662 msgid "Human and Data Loss"
0663 msgstr ""
0664 
0665 #: ../../asset_management/data_protection.rst:220
0666 msgid ""
0667 "Human error, as in everything, is a major problem in data loss. Take a deep "
0668 "breath and stop. Panic is a common reaction, and people do really stupid "
0669 "things. Experienced users will pull the wrong drive from a `RAID <https://en."
0670 "wikipedia.org/wiki/RAID>`_ array or reformat a drive, destroying all their "
0671 "information. Acting without thinking is dangerous to your data. Stop "
0672 "stressing about the loss and don’t do anything to the disk. Better yet, stop "
0673 "using the computer until you have a plan. Sit down and explain you plan to a "
0674 "laymen or better, laywoman. You will be amazed how many stupid ideas you'll "
0675 "discover yourself in such an exercise."
0676 msgstr ""
0677 
0678 #: ../../asset_management/data_protection.rst:222
0679 msgid ""
0680 "If your disk is making weird noises, normal file recovery software isn’t "
0681 "going to work. Do a quick backup if that is going to happen to you. If the "
0682 "drive is still spinning and you can’t find your data, look for a data "
0683 "recovery utility and backup to another computer or drive. An Universal and "
0684 "powerful solution can be to use  `CloneZilla open-source suite <https://en."
0685 "wikipedia.org/wiki/Clonezilla>`_. The important thing is to download them "
0686 "onto another drive, either on another computer, or onto a USB thumb drive or "
0687 "hard disk. It is good practice to save the recovered data to another disk. "
0688 "`dd tool <https://en.wikipedia.org/wiki/Dd_(Unix)>`_ is your friend on Linux "
0689 "systems."
0690 msgstr ""
0691 
0692 #: ../../asset_management/data_protection.rst:225
0693 msgid "Common Myths Dispelled"
0694 msgstr ""
0695 
0696 #: ../../asset_management/data_protection.rst:227
0697 msgid "We would like to dispel some common myths:"
0698 msgstr ""
0699 
0700 #: ../../asset_management/data_protection.rst:229
0701 msgid ""
0702 "Open Source file systems are less prone to data loss than proprietary "
0703 "systems: Wrong, NTFS is rather a tiny notch better than ext4, ReiserFs, JFS, "
0704 "XFS, to name just the most popular file systems that often come as default "
0705 "storage format disk used by distributions."
0706 msgstr ""
0707 
0708 #: ../../asset_management/data_protection.rst:231
0709 msgid ""
0710 "Journalize files systems prevent data corruption/loss: Wrong, they only "
0711 "speed up the scan process in case of a sudden interrupt during operation and "
0712 "prevent ambiguous states. But if a file was not entirely saved before the "
0713 "mishap, it'll be lost."
0714 msgstr ""
0715 
0716 #: ../../asset_management/data_protection.rst:233
0717 msgid ""
0718 "`RAID <https://en.wikipedia.org/wiki/RAID>`_ systems prevent data corruption/"
0719 "loss: Mostly wrong, **RAID 0 and 1** prevent you from nothing, **RAID 5** "
0720 "can prevent data loss due to disk-failures (but not from disk or file system "
0721 "errors). Many low-end RAID controllers (most mother board controllers are) "
0722 "don’t report problems, figuring you’ll never notice. If you do notice, "
0723 "months later, what is the chance that you’ll know it was the controller’s "
0724 "fault? One insidious problem is corruption of **RAID 5** parity data. It is "
0725 "pretty simple to check a file by reading it and matching the metadata. "
0726 "Checking parity data is much more difficult, so you typically won’t see "
0727 "parity errors until a rebuild. Then, of course, it is too late."
0728 msgstr ""
0729 
0730 #: ../../asset_management/data_protection.rst:235
0731 msgid ""
0732 "Viruses are the biggest thread to digital data: Wrong. Theft, and human "
0733 "errors are the primary cause of data loss."
0734 msgstr ""
0735 
0736 #: ../../asset_management/data_protection.rst:238
0737 msgid "Storage Volume Estimation"
0738 msgstr ""
0739 
0740 #: ../../asset_management/data_protection.rst:240
0741 msgid ""
0742 "Digital camera sensors are 1-2 aperture stops away from fundamental physical "
0743 "limitations. What we mean is this: as technology evolves, there is a natural "
0744 "limit to its progress. Sensitivity and noise characteristics for any kind of "
0745 "light sensor are not far from that limit."
0746 msgstr ""
0747 
0748 #: ../../asset_management/data_protection.rst:242
0749 msgid ""
0750 "Today's cameras tend towards 50 mega pixels sensors, although this "
0751 "resolution is already too high for compact cameras and deteriorates the end "
0752 "result. Given the sensor size and quality of optics, 12 mega pixels are "
0753 "optimum for compact cameras. Even DSLR cameras run into their limits at "
0754 "20-24 mega pixels, for higher resolutions one has to go for full frame "
0755 "sensors (24x36mm) or even bigger formats."
0756 msgstr ""
0757 
0758 #: ../../asset_management/data_protection.rst:244
0759 msgid ""
0760 "So, taking into account the manufacturer mega pixel propaganda it seems save "
0761 "to say that the bulk of future cameras will see less than 30 mega pixels. "
0762 "This gives us an estimation for the necessary storage space per photograph "
0763 "in the long run: <40 MB per image. Even if file versioning will be "
0764 "introduced (grouping of variations of a photograph under one file "
0765 "reference), the trend is to implement scripting of changes so that a small "
0766 "overhead will be recorded only and not a whole different image per version. "
0767 "With faster hardware this concept will see it's maturity quite soon."
0768 msgstr ""
0769 
0770 #: ../../asset_management/data_protection.rst:246
0771 msgid ""
0772 "In order to estimate the amount of storage space you have to plan for, "
0773 "simply determine the number of photographs you take per year (easy with :ref:"
0774 "`digiKam's timeline sidebar tab <timeline_view>`) and multiply it by 40 MB. "
0775 "Most users will keep less than 2000 pictures per year which requires less "
0776 "than 80 GB/year. Assuming that you will change your hard disk (or whatever "
0777 "media in the future) every 4-5 years, the natural increase in storage "
0778 "capacity will suffice to keep you afloat."
0779 msgstr ""
0780 
0781 #: ../../asset_management/data_protection.rst:248
0782 msgid ""
0783 "The more ambitious ones out there will need more space, much more maybe. "
0784 "Think of buying a file server, Giga-Ethernet comes integrated into "
0785 "motherboards today and it's a flick to fetch the files over the local "
0786 "network. Speaking about modern mobos: they now the capability to SATA media "
0787 "through an USB connectors. This makes it really a trifle to buy an external "
0788 "SATA drive and hook it up to your machine. 4000 GB drives will hit the "
0789 "market in 2020. These are terrific compact storage containers for backup "
0790 "swapping: keep one drive at home and one somewhere else."
0791 msgstr ""
0792 
0793 #: ../../asset_management/data_protection.rst:251
0794 msgid "Backup and Recover"
0795 msgstr ""
0796 
0797 #: ../../asset_management/data_protection.rst:253
0798 msgid ""
0799 "A 4 TB HDD is not very expensive today. Do not blame anybody else for data "
0800 "loss. 6% of all PCs will suffer an episode of data loss in any given year. "
0801 "Backup your data often according to a plan, and back it up and test the "
0802 "backup before you do anything dramatic like re-installing your OS, changing "
0803 "disks, resizing partitions and so on."
0804 msgstr ""
0805 
0806 #: ../../asset_management/data_protection.rst:256
0807 msgid "Disaster Prevention"
0808 msgstr ""
0809 
0810 #: ../../asset_management/data_protection.rst:258
0811 msgid ""
0812 "Say, you religiously do your backups every day on a external SATA drive. "
0813 "Then comes the day where lightning strikes. Happy you if the external drive "
0814 "was not connected at that moment."
0815 msgstr ""
0816 
0817 #: ../../asset_management/data_protection.rst:260
0818 msgid ""
0819 "Disasters strike locally and destroy a lot. Forget about airplane crashes: "
0820 "fire, water, electricity, kids and theft are dangerous enough to our data. "
0821 "They usually cover a whole room or house."
0822 msgstr ""
0823 
0824 #: ../../asset_management/data_protection.rst:262
0825 msgid ""
0826 "Therefore disaster control means de-localized storage. Move your backups "
0827 "upstairs, next house, to your bureau (and vise versa), whatever."
0828 msgstr ""
0829 
0830 #: ../../asset_management/data_protection.rst:264
0831 msgid ""
0832 "There is another good aspect to the physical separation: as said above, "
0833 "panic is often the cause of destroying data, even the backup data. Having a "
0834 "backup not at hand right away may safe your ass one day."
0835 msgstr ""
0836 
0837 #: ../../asset_management/data_protection.rst:267
0838 msgid "Backup Technicalities"
0839 msgstr ""
0840 
0841 #: ../../asset_management/data_protection.rst:269
0842 msgid ""
0843 "**Full Backup**: A complete backup of all the files being backed up. It is a "
0844 "snapshot without history, it represents a full copy at one point in time."
0845 msgstr ""
0846 
0847 #: ../../asset_management/data_protection.rst:271
0848 msgid ""
0849 "**Differential Backup**: A backup of only the files that have changed since "
0850 "the last full backup. Constitutes a full snapshot of two points in time: the "
0851 "full backup and the last differential one."
0852 msgstr ""
0853 
0854 #: ../../asset_management/data_protection.rst:273
0855 msgid ""
0856 "**Incremental Backup**: A backup of only the files that have changed since "
0857 "last whatever backup. Constitutes multiple snapshots. You can recreate the "
0858 "original state at any point in time such a backup was made. This comes "
0859 "closest to a versioning system except that it is only sampled and not "
0860 "continuous."
0861 msgstr ""
0862 
0863 #: ../../asset_management/data_protection.rst:276
0864 msgid "Backup The Data"
0865 msgstr ""
0866 
0867 #: ../../asset_management/data_protection.rst:278
0868 msgid "The Best practice at all is to backup the data:"
0869 msgstr ""
0870 
0871 #: ../../asset_management/data_protection.rst:280
0872 msgid "Do a **full backup** in a external storage device."
0873 msgstr ""
0874 
0875 #: ../../asset_management/data_protection.rst:282
0876 msgid "Verify its **data integrity** and put it away (disaster control)."
0877 msgstr ""
0878 
0879 #: ../../asset_management/data_protection.rst:284
0880 msgid "Have another storage device for **frequent backups**."
0881 msgstr ""
0882 
0883 #: ../../asset_management/data_protection.rst:286
0884 msgid ""
0885 "**Swap the devices** every other month after having verified data integrity."
0886 msgstr ""
0887 
0888 #: ../../asset_management/data_protection.rst:289
0889 msgid "A Useful Tool to Backups"
0890 msgstr ""
0891 
0892 #: ../../asset_management/data_protection.rst:291
0893 msgid ""
0894 "Linux `rsync <https://en.wikipedia.org/wiki/Rsync>`_ is a wonderful little "
0895 "utility that's amazingly easy to set up on your machines. Rather than have a "
0896 "scripted FTP session, or some other form of file transfer script - rsync "
0897 "copies only the differences of files that have actually changed, compressed "
0898 "and through ssh if you want to for security. That's a mouthful."
0899 msgstr ""
0900 
0901 #: ../../asset_management/data_protection.rst:293
0902 msgid "A reasonable backup approach for images could be this one:"
0903 msgstr ""
0904 
0905 #: ../../asset_management/data_protection.rst:295
0906 msgid ""
0907 "Backup important images right away (after dumping them to a computer) to "
0908 "optical media."
0909 msgstr ""
0910 
0911 #: ../../asset_management/data_protection.rst:297
0912 msgid "Do daily incremental backup of the work space."
0913 msgstr ""
0914 
0915 #: ../../asset_management/data_protection.rst:299
0916 msgid ""
0917 "Do a weekly differential backup and delete integral backups of week-2 (two "
0918 "weeks ago)."
0919 msgstr ""
0920 
0921 #: ../../asset_management/data_protection.rst:301
0922 msgid "Do a monthly differential backup and delete backup of month-2."
0923 msgstr ""
0924 
0925 #: ../../asset_management/data_protection.rst:303
0926 msgid ""
0927 "If not physically separated already, separate it now (swapping-in another "
0928 "backup drive)."
0929 msgstr ""
0930 
0931 #: ../../asset_management/data_protection.rst:305
0932 msgid ""
0933 "This protocol tries to leave you enough time to spot losses and to recover "
0934 "fully at the same time keeping the backup volume at <130% of the working "
0935 "space. You end up with a daily version of the last 7-14 days, a weekly "
0936 "snapshot for at least one month, and a snapshot of every month. Any more "
0937 "thinning should be done by hand after a full verification. Preserve your "
0938 "images through the changes of technology and owners"
0939 msgstr ""
0940 
0941 #: ../../asset_management/data_protection.rst:308
0942 msgid ""
0943 "In order for your valuable images to **survive the next 40 years** or so "
0944 "(because that's about the time that you will become really interested to "
0945 "revisit those nice old photographs of you as a child, adolescent etc.) there "
0946 "are two strategies to be observed:"
0947 msgstr ""
0948 
0949 #: ../../asset_management/data_protection.rst:310
0950 msgid ""
0951 "**Keep up with technology**, don't lag behind more than a couple of years."
0952 msgstr ""
0953 
0954 #: ../../asset_management/data_protection.rst:312
0955 msgid "Save your photos in an open, **non-proprietary standard**."
0956 msgstr ""
0957 
0958 #: ../../asset_management/data_protection.rst:315
0959 msgid "Keep Up With Technology"
0960 msgstr ""
0961 
0962 #: ../../asset_management/data_protection.rst:317
0963 msgid ""
0964 "As the future is unforeseeable by nature, everything said today is to be "
0965 "taken with caution, and to be reviewed as we advance. Unfortunately there is "
0966 "no shortcut possible to some basic vigilance. Every 5-8 years at least one "
0967 "should ask oneself the question of backwards compatibility of current "
0968 "systems. The less variants we used in the past the less questions are to be "
0969 "answered in the future."
0970 msgstr ""
0971 
0972 #: ../../asset_management/data_protection.rst:319
0973 msgid ""
0974 "Of course every time you change your computer system (machine, operating "
0975 "system, applications, DRM) you have to ask yourself the same questions. "
0976 "Today, if you want to switch to Windows, you have to ask yourself three "
0977 "times if you still can import your pictures, and, more important so, if you "
0978 "are ever able to move them onto some other system or machine. Chances are "
0979 "good that you cannot. We see many people struggling around us, because "
0980 "Windows enforces a strict DRM regime. How can you proof to Windows that you "
0981 "are actually the owner of your pictures copyright?"
0982 msgstr ""
0983 
0984 #: ../../asset_management/data_protection.rst:321
0985 msgid ""
0986 "Basically the questions should be answered along the line explained in this "
0987 "document: use and change to open standards supported by a manifold of "
0988 "applications."
0989 msgstr ""
0990 
0991 #: ../../asset_management/data_protection.rst:323
0992 msgid ""
0993 "Virtualization becomes available now for everybody. So if you have an old "
0994 "system that is important for reading your images, keep it, install it as a "
0995 "virtual machine for later."
0996 msgstr ""
0997 
0998 #: ../../asset_management/data_protection.rst:325
0999 msgid ""
1000 "Otherwise the advice is quite simple: every time you change your computer "
1001 "architecture, your storage and backup technology, your file format, check it "
1002 "out, go through your library and convert to a newer standard if necessary. "
1003 "And keep to open standards."
1004 msgstr ""
1005 
1006 #: ../../asset_management/data_protection.rst:328
1007 msgid "Scalability"
1008 msgstr ""
1009 
1010 #: ../../asset_management/data_protection.rst:330
1011 msgid ""
1012 "Scalability is the tech-geek expression of the (easy) capability of a system "
1013 "to be resized, which always means up-sized."
1014 msgstr ""
1015 
1016 #: ../../asset_management/data_protection.rst:332
1017 msgid ""
1018 "Lets assume you planned for scalability and dedicated the container you want "
1019 "to increase to a separate disk or partition. On Linux system you then can "
1020 "copy and resize the container to the new disk."
1021 msgstr ""
1022 
1023 #: ../../asset_management/data_protection.rst:337
1024 msgid "Use Open File Formats"
1025 msgstr ""
1026 
1027 #: ../../asset_management/data_protection.rst:339
1028 msgid ""
1029 "The short history of the digital era in the past 20 years has proven over "
1030 "and over again that proprietary formats are not the way to go when you want "
1031 "your data to be intelligible 10 years into the future. Microsoft is "
1032 "certainly the well known culprit of that sort because of its domineering "
1033 "market share. But other companies are actually (if inadvertently) worse "
1034 "since they may not stay long enough in the market at all or have a small "
1035 "user/contributor base only. In the case of Microsoft one has at least the "
1036 "advantage of many people sharing the same problems. Finding a solution has "
1037 "therefore much more success. Still, in some cases Microsoft is using Open "
1038 "Source documentation to understand their own systems, so badly maintained "
1039 "have been their own documentation. Usually with any given MSoffice suite one "
1040 "cannot properly read a document created with the same application two major "
1041 "versions earlier."
1042 msgstr ""
1043 
1044 #: ../../asset_management/data_protection.rst:341
1045 msgid ""
1046 "Image formats have had a longer live time than office documents and are a "
1047 "bit less affected by obsolescence."
1048 msgstr ""
1049 
1050 #: ../../asset_management/data_protection.rst:343
1051 msgid ""
1052 "Open Source standards have the huge advantage of having an open "
1053 "specification. Even if one day in the future there'll be no software to read "
1054 "it anymore, one can recreate such software, a task becoming simpler every "
1055 "year."
1056 msgstr ""
1057 
1058 #: ../../asset_management/data_protection.rst:349
1059 msgid "digiKam Image Editor Default Save Settings For Common Image Formats"
1060 msgstr ""
1061 
1062 #: ../../asset_management/data_protection.rst:351
1063 msgid ""
1064 "**JPEG** has been around for a while now, and whilst it's a lossy format "
1065 "losing a bit every time you make a modification and save it, it is "
1066 "ubiquitous, supports JFIF, Exif, IPTC and XMP metadata, has good compression "
1067 "ratios and can be read by all imaging software. Because of its metadata "
1068 "limitation, lossy nature, absence of transparency and 8 bit color channel "
1069 "depth, we do not recommend it. JPEG2000 is better, can be employed lossless, "
1070 "but lacks in user base."
1071 msgstr ""
1072 
1073 #: ../../asset_management/data_protection.rst:353
1074 msgid ""
1075 "**GIF** is a proprietary. patented format and slowly disappearing from the "
1076 "market. Don't use it."
1077 msgstr ""
1078 
1079 #: ../../asset_management/data_protection.rst:355
1080 msgid ""
1081 "**PNG** has been invented as a Open Source standard to replace GIF, but it "
1082 "does much more. It is lossless, supports XMP, Exif and IPTC metadata, 16 bit "
1083 "color encoding and full transparency. PNG can store gamma and chromaticity "
1084 "data for improved color matching on heterogeneous platforms. Its drawback "
1085 "are a relatively big footprints (but smaller than TIFF) and slow "
1086 "compression. We recommend it."
1087 msgstr ""
1088 
1089 #: ../../asset_management/data_protection.rst:357
1090 msgid ""
1091 "**TIFF** has been widely accepted as an image format. TIFF can exist in "
1092 "uncompressed form or in a container using a lossless compression algorithm "
1093 "(Deflate). It maintains high image quality but at the expense of much larger "
1094 "file sizes. Some cameras let you save your images in this format. The "
1095 "problem is that the format has been altered by so many people that there are "
1096 "now 50 or more flavors and not all are recognizable by all applications."
1097 msgstr ""
1098 
1099 #: ../../asset_management/data_protection.rst:359
1100 msgid ""
1101 "**PGF** for Progressive Graphics File is another not so known but open file "
1102 "image format. Wavelet-based, it allows lossless and lossy data compression. "
1103 "PGF compares well with **JPEG 2000** but it was developed for speed "
1104 "(compression/decompression) rather than to be the best at compression ratio. "
1105 "At the same file size a PGF file looks significantly better than a JPEG one, "
1106 "while remaining very good at progressive display too. PGF format is used "
1107 "internally in digiKam to store compressed thumbnails in the database. For "
1108 "more information about the PGF format see the `libPGF homepage <https://"
1109 "libpgf.org/>`_"
1110 msgstr ""
1111 
1112 #: ../../asset_management/data_protection.rst:365
1113 msgid "digiKam Image Editor Raw Import Tool"
1114 msgstr ""
1115 
1116 #: ../../asset_management/data_protection.rst:367
1117 msgid ""
1118 "**RAW** format. Some, typically more expensive, cameras support RAW format "
1119 "shooting. The RAW format is not really an image standard at all, it is a "
1120 "container format which is different for every brand and camera model. RAW "
1121 "format images contain minimally processed data from the image sensor of a "
1122 "digital camera or image scanner. Raw image files are sometimes called "
1123 "digital negatives, as they fulfill the same role as film negatives in "
1124 "traditional chemical photography: that is, the negative is not directly "
1125 "usable as an image, but has all of the information needed to create an "
1126 "image. Storing photographs in a camera's RAW format provides for higher "
1127 "dynamic range and allows you to alter settings, such as white balance, after "
1128 "the photograph has been taken. Most professional photographers use RAW "
1129 "format, because it offers them maximum flexibility. The downside is that RAW "
1130 "image files can be very large indeed."
1131 msgstr ""
1132 
1133 #: ../../asset_management/data_protection.rst:369
1134 msgid ""
1135 "We recommend clearly to **abstain from archiving in RAW format** (as opposed "
1136 "to shooting in RAW format, which we recommend). It has all bad ingredients: "
1137 "many varieties and proprietary nature. It is clear that in a few years time "
1138 "you cannot use your old RAW files anymore. We have already seen people "
1139 "changing camera, losing their color profiles and having great difficulty to "
1140 "treat their old RAW files correctly. Better change to DNG format."
1141 msgstr ""
1142 
1143 #: ../../asset_management/data_protection.rst:371
1144 msgid ""
1145 "**DNG** or Digital Negative file format is a royalty free and open RAW image "
1146 "format designed by Adobe Systems. DNG was a response to demand for a "
1147 "unifying camera raw file format. It is based on the TIFF/EP format, and "
1148 "mandates use of metadata. A handful of camera manufacturers have adopted DNG "
1149 "already, let's hope that the main contenders Canon and Nikon will use it one "
1150 "day. `Apple ProRAW <https://support.apple.com/en-us/HT211965>`_ format "
1151 "available since the iPhone 12 Pro Max is based on DNG."
1152 msgstr ""
1153 
1154 #: ../../asset_management/data_protection.rst:377
1155 msgid ""
1156 "digiKam Provide a Tool to Convert in Batch RAW to DNG in :ref:`Batch Queue "
1157 "Manager <dng_converter>`"
1158 msgstr ""
1159 
1160 #: ../../asset_management/data_protection.rst:379
1161 msgid ""
1162 "We strongly recommend converting RAW files to DNG for archiving. Despite the "
1163 "fact that DNG was created by Adobe, it is an open standard and widely "
1164 "embraced by the Open Source community (which is usually a good indicator of "
1165 "perennial properties). Some manufacturers have already adopted DNG as RAW "
1166 "format. And last not least, Adobe is the most important source of graphical "
1167 "software today, and they of course support their own invention. It is an "
1168 "ideal archival format, the raw sensor data will be preserved as such in TIFF "
1169 "format inside DNG, so that the risk associated with proprietary RAW formats "
1170 "is alleviated. All of this makes migration to another operating system a no-"
1171 "brainer."
1172 msgstr ""
1173 
1174 #: ../../asset_management/data_protection.rst:385
1175 msgid ""
1176 "digiKam Provide Tools to Convert RAW to DNG during :ref:`Download from "
1177 "Camera <camera_dngconvert>`"
1178 msgstr ""
1179 
1180 #: ../../asset_management/data_protection.rst:387
1181 msgid ""
1182 "**XML** for Extensible Mark-up Language or **RDF** for Resource Description "
1183 "Framework. XML is like HTML, but where HTML is mostly concerned with the "
1184 "presentation of data, XML is concerned with the *representation* of data. On "
1185 "top of that, XML is non-proprietary, operating-system-independent, fairly "
1186 "simple to interpret, text-based and cheap. RDF is the WC3's solution to "
1187 "integrate a variety of different applications such as library catalogs, "
1188 "world-wide directories, news feeds, software, as well as collections of "
1189 "music, images, and events using XML as an interchange syntax. Together the "
1190 "specifications provide a method that uses a lightweight ontology based on "
1191 "the Dublin Core which also supports the \"Semantic Web\" (easy exchange of "
1192 "knowledge on the Web)."
1193 msgstr ""
1194 
1195 #: ../../asset_management/data_protection.rst:390
1196 msgid "IPTC Goes XMP"
1197 msgstr ""
1198 
1199 #: ../../asset_management/data_protection.rst:392
1200 msgid ""
1201 "That's probably one of the reasons why, around 2001, that Adobe introduced "
1202 "its XML based XMP technology to replace the *Image Resource Block* "
1203 "technology of the nineties. XMP stands for **Extensible Metadata Platform**, "
1204 "a mixture of XML and RDF. It is a labeling technology that lets users embed "
1205 "data about a file in the file itself, the file info is saved using the "
1206 "extension :file:`*.xmp*` (signifying the use of XML/RDF)."
1207 msgstr ""
1208 
1209 #: ../../asset_management/data_protection.rst:394
1210 msgid ""
1211 "`XMP <https://en.wikipedia.org/wiki/Extensible_Metadata_Platform>`_: As much "
1212 "as ODF will be readable forever (since its containing text is written in "
1213 "clear text), XMP will preserve your metadata in a clearly understandable "
1214 "format XML. No danger here of not being able to read it later. It can be "
1215 "embedded into the image files or as a separate accompanying file "
1216 "(**Sidecar** concept). XMP can be used in PDF, JPEG, JPEG2000, GIF, PNG, "
1217 "HTML, TIFF, Adobe Illustrator, PSD, Postscript, Encapsulated Postscript, and "
1218 "video files. In a typical edited JPEG file, XMP information is typically "
1219 "included alongside Exif and IPTC data."
1220 msgstr ""
1221 
1222 #: ../../asset_management/data_protection.rst:400
1223 msgid "digiKam can display XMP Contents from Image and Video"
1224 msgstr ""
1225 
1226 #: ../../asset_management/data_protection.rst:402
1227 msgid ""
1228 "Embedding metadata in files allows easy sharing and transfer of files across "
1229 "products, vendors, platforms, customers, without metadata getting lost. The "
1230 "most common metadata tags recorded in XMP data are those from the Dublin "
1231 "Core Metadata Initiative, which include things like title, description, "
1232 "creator, and so on. The standard is designed to be extensible, allowing "
1233 "users to add their own custom types of metadata into the XMP data. XMP "
1234 "generally does not allow binary data types to be embedded. This means that "
1235 "any binary data one wants to carry in XMP, such as thumbnail images, must be "
1236 "encoded in some XML-friendly format, such as Base-64."
1237 msgstr ""
1238 
1239 #: ../../asset_management/data_protection.rst:404
1240 msgid ""
1241 "Many photographers prefer keeping an original of their shots (mostly RAW) "
1242 "for the archive. XMP suits that approach as it keeps metadata separate from "
1243 "the image file. We do not share this point of view. There could be problems "
1244 "linking metadata file and image file, and as said above, RAW formats will "
1245 "become obsolete. We recommend using DNG as a container and putting "
1246 "everything inside."
1247 msgstr ""
1248 
1249 #: ../../asset_management/data_protection.rst:406
1250 msgid ""
1251 "The `Dublin Core Metadata Initiative <https://www.dublincore.org/>`_ is an "
1252 "open organization engaged in the development of interoperable online "
1253 "metadata standards that support a broad range of purposes and business "
1254 "models. DCMI's activities include work on architecture and modeling, "
1255 "discussions and collaborative work in DCMI Communities and DCMI Task Groups, "
1256 "annual conferences and workshops, standards liaison, and educational efforts "
1257 "to promote widespread acceptance of metadata standards and practices."
1258 msgstr ""
1259 
1260 #: ../../asset_management/data_protection.rst:412
1261 msgid "digiKam Support Sidecar Files With many Options From Settings Panel"
1262 msgstr ""
1263 
1264 #: ../../asset_management/data_protection.rst:415
1265 msgid "Protect Your Data"
1266 msgstr ""
1267 
1268 #: ../../asset_management/data_protection.rst:417
1269 msgid "Use surge protectors (UL 1449 standard), possibly combined with a UPS."
1270 msgstr ""
1271 
1272 #: ../../asset_management/data_protection.rst:419
1273 msgid ""
1274 "Use ECC memory to verify correct data transmission (even just saving files)."
1275 msgstr ""
1276 
1277 #: ../../asset_management/data_protection.rst:421
1278 msgid "Watch your hard drives (temperature, noise...), make backups."
1279 msgstr ""
1280 
1281 #: ../../asset_management/data_protection.rst:423
1282 msgid "Keep backups at another location, locked up, use web storage space."
1283 msgstr ""
1284 
1285 #: ../../asset_management/data_protection.rst:425
1286 msgid "Use archival media and burners."
1287 msgstr ""
1288 
1289 #: ../../asset_management/data_protection.rst:427
1290 msgid ""
1291 "Don't panic in case of data loss, explain your recovery plan to a layperson."
1292 msgstr ""
1293 
1294 #: ../../asset_management/data_protection.rst:429
1295 msgid ""
1296 "Choose you file system, partitions, folders to cater for easy scalability."
1297 msgstr ""
1298 
1299 #: ../../asset_management/data_protection.rst:431
1300 msgid "Use open, non-proprietary standards to manage and save photographs."
1301 msgstr ""
1302 
1303 #: ../../asset_management/data_protection.rst:433
1304 msgid "Do a technology/migration review at least every 5 years."
1305 msgstr ""