Changes

SegaArchive-CDquality dump means that the resulting compressed dump, PC-Enginewhen reverted back to its original state, PlayStationwill be the same checksum as the official uncompressed release. Compressions that can't be reversed, Sega Saturn... what did these or those that can be but will have in common was their reliance on the regular CD formatmissing or altered content, whether it interferes with functionality (rebuilt table of content) or not, are not archive quality dumps. Game developers stored often orchestrated/Redbook music and occasionally voice actingFor example, using the Audio-CD WBFS format. Of course, the CD contained also game datais not archive quality since it may be missing padding content and upgrade partitions (which have their uses in 3DS/Wii modding) compared to an intact uncompressed dump.

==Applicable to All Platforms=====Audio-CD===Sega-CD, PC-Engine, PlayStation, Sega Saturn... what did these have in common was their reliance on the regular CD format. Game developers stored often orchestrated/Redbook music and occasionally voice acting, using the Audio-CD format. Of course, the CD contained also game data. But it was terribly inefficient when it comes to disk storage. Even a 700 MB CD containing nothing but Audio-CD data can hold at most around 80 minutes worth of sound data.

* '''Archive-quality dump?''' No(unless audio is converted to and from uncompressed formats, which is unlikely)* '''Gain:''' Several hundreds of MBs to just a few dozendozens, depending on how much this specific game relies on the Audio-CD sound format

* '''Can be reverted?''' Yes, just burn the ISO+MP3/WAV+CUE again using a CD burner tool (ImgBurner) either to a physical disk, or as a an ISO+BIN file. Lossy audio formats will result in data loss.

=Padding=M3U (playlist) files may be used too for this distribution scheme. Sometimes dumps that come this way may not work on some emulators. This is often due to incorrect CUE files sometimes using wrong filenames or MP3 files instead of WAV files.

BUT-- the most common bar none use for this is to screw with pirates and people who download ISOs off online sharing websites, by making the ISO bigger and harder to download. Some go a little step further and make that garbage data , not just a sequence of 00/FF to make the ISO much, much harder to compress using regular archive formats like zip/7zip/rar... You might be overjoyed to learn this has become the industry standard nowadays. Many compression schemes remove or simplify padding patterns to allow for easier compression. ===CHD Compression===* '''Archive-quality dump?''' Yes* '''Gain:''' Immediate* '''Tools Used:''' chdman (included with MAME)* '''Can be reverted?''' Yes, using extractcd (included with MAME)* '''Playable on Hardware?''' No.* '''Playable on Emulators?''' Only MAME and DEmul. Some libretro cores for other emulators started adding support.* '''Can process multi track bin files?''' Yes. MAME uses the CHD format for disc images in general and includes tools to convert from and to it. It uses 7zip's LZMA compression on the game data and lossless FLAC compression for the audio data to optimize compression even further than with the BIN+CUE+MP3/WAV data separation alone. Placing chdman and extractcd in the same directory as dumps in BIN+CUE format, the following command-line instructions can be used:* BIN/CUE to CHD: <code>for %i in (*.cue) do chdman createcd -i "%i" -o "%~ni.chd"</code> (Windows)* CHD to BIN/CUE: <code>for %i in (*.chd) do chdman extractcd -i "%i" -o "%~ni.cue"</code> (Windows) If you have one of the European PSX games that feature LibCrypt copy protection, you have a .sbi file in addition to the .bin/cue file. The CHD creation process doesn't process the .sbi file. Thus, you will need the .sbi file in the same directory as the.CHD file for the game to run.

* '''Archive-quality dump?''' No(removes error correction data permanently)

* '''Can be reverted?''' Yes. Using , using the same tools (unECM). ThereHowever, there's a data loss (error correction data) which can damage a select few games. Check the hash with Redump to make sure nothing was altered.

* '''Gain:''' Immediate (ISO size decreases a lot). Official format used by Sony for PS1 dumps on PSP.* '''Tools Used:''' [https://www.reddit.com/r/PSP/wiki/psx2psp PSX2PSP], Popstation MD GUI, [https://www.psx-place.com/threads/w-i-p-utilities-cdda-enabler-for-psx-eboots-on-ps3.23539/ CDDA-ENABLER] (optimized for PS3) . Generates an EBOOT.PBP file.

* '''Can be reverted?''' Yes. Using (For homemade EBOOTs) by using the same tool, to generate BIN+CUE files; (for commercial releases from PSN) [https://github.com/xdotnano/PSXtract PSXtract]. There's negligible data loss, although it's negligible in terms of functionality.

* '''Playable on Emulators?''' Retroarch, mednafenRetroArch, PCSX-R , and ePSXe.PlayStation 3's ps1_netemu (after packaging into a PS1 Classic and installation of said package). Official format used by Sony for PS1 Classics on PSP and PS3. Audio tracks may be compressed in ATRAC3, or as raw PCM (unsupported on PS3's ps1_netemu, supported on PSP only by the earliest versions of POPS or the newest ones with the [http://wololo.net/talk/viewtopic.php?f=28&t=41330&start=60 cdda_enabler plugin])

Often, you can open the ISO in UltraISO and find the dummy files. Sometimes they're obvious obviously looking files like DUMMY.BIN, DATA0.BIN (or .DAT), DUMMY.DAT, etc. Or folders named "PADDING" and stuff like that. You can look into the files (with a hex editor) to see if they're obvious padding data (full of 00/FF, though sometimes it's not as obvious).

However, you must never mess with LBA and TOC when removing padding. So you try to change the size of the padding file inside the ISO to 0 MB, or alter it directly with a hex editor so that it's all zeroed out.

* '''Archive-quality dump?''' YesNo (missing data)

Use 7zip ("Add to archive..." then choose to gzip) or Pigz (multi-threaded, much faster compression) to generate gzip archives containing the ISO file in question. PCSX2 will build an index of each gzip compressed game it loads (as a file in the same directory as the gzip archive), so after the first time where you'll have to wait for the decompression, in all subsequent times there is no speed difference between playing an uncompressed and compressed game. Of course, you can extract the ISO back from the GZIP archive.

* '''Archive-quality dump?''' YesNo (missing data)

* '''Can be reverted?''' Yes. Using , using the same tool. No data loss.

* '''Archive-quality dump?''' YesMaybe: while the actual compression is inherently lossless, depending on the conversion software and/or its configuration, so-called ripping (deletion or zero-resizing of the system update, videos, or other files) may be performed on the fly.* '''Gain:''' Immediate (ISO dump size lowers). Substantial, depending on game. Increases Higher compression levels generally produce decreasing space gains while potentially increasing load times on real hardware but not emulators. Some tools allow for leaving audio/video content uncompressed.* '''Tools Used:''' CISO, CISO GUI, maxcso, UMDGen or , PSP ISO Compressor, CISO Multi Compressor, CISO XP, ...

* '''Can be reverted?''' Yes. Using same tools, but saving Official format for digitally distributed PSP/minis (partially related to ISO (Uncompressedthe one used for PS1 games) format. No data loss.* '''Playable on Hardware?''' Yes. Longer load times though.* '''Playable on Emulators?''' Yes. PPSSPP, containing a compressed disc image and optionally a custom boot logo.

==DreamCastDreamcast==

* '''Archive-quality dump?''' YesNo (missing data, no gameplay issues)

* '''Playable on Emulators?''' Yes - Demul DEmul, Reicast and ReicastRedream

* Xenoblade PAL (Wii): 7.8 GB (original) > 6.3 GB (GCZ) * Super Mario Galaxy 2 (Wii): 4.7 GB (original) > 1.8 GB (GCZ)

* Megaman Collection (GC): 1.4 GB (original) > 1.1 GB (originalGCZ) (sound data is stored as uncompressed stream to fill disk)

Dolphin can't play game People used to resort to WiiScrubber (Wii) and GCM Utility (GC) to scrub/trim games to end up with dumps off compressed archives that while they had no immediate size change, their randomized garbage data (7zip/like "dummy", "padding" or "znull") was still there but zeroed out making archived dumps using zip/gzip7zip/rarformats have stunning gains (from 1.4GB uncompressed to 26MB zipped for Animal Crossing for example!)..) directlyOf course, the file still needed to be uncompressed to its full size everytime you wanted to play it.

People used to resort to WiiScrubber (Wii) Trimming and GCM Utility scrubbing (GCin Wiiscrubber terms) to scrub/trim games to end up with dumps that while aren't the same! While they had no immediate size change, their randomized both are terms for "zeroing garbage data (like "dummy"to make it more compression-friendly, "padding" or "znull") was still there trimming does not just that like scrubbing but zeroed out making archived dumps using zip/7zip/rar formats have stunning gains (from 1.4GB uncompressed takes the extra step of relocating the garbage data to 26MB zipped for Animal Crossing for example!). Of course the end of the file still needed , hence altering its TOC and requiring the disc to be uncompressed fakesigned, for a not-so-big compression gain. Hence why scrubbing is by far the most authentic and safe way to its full size everytime you wanted to play itsolve the garbage data problem.

'''NOTE:''' Trimming and scrubbing (in Wiiscrubber terms) aren't However compressed formats incorporating the same! While they both are terms for "padding zeroing garbage data" to make it more compression-friendly, trimming does not just that like scrubbing, but takes the extra step of relocating the garbage data to the end of the filepart were made since then, hence altering its TOC and requiring Dolphin supports them! These are the disc to be fakesigned, for a not-so-big compression gain. Hence why scrubbing is by far the most authentic WBFS and safe way to solve the garbage data problemGCZ formats.

However compressed formats incorporating the "padding zeroing" part were made since then, and ===GCZ (Dolphin supports them! (Of course, if you're into moddingnative archive format) - GC/rom-hacking games, the previous tools might be of interest to you, but this is a story for another time...) Wii===

===GCZ (Dolphin native archive format) - GC/Wii===* can'''Archive-quality dump?''' Yes for GC t play games, No for Wii games (doesn't keep MD5 hash)* '''Gain:''' Immediate directly from compressed archives (ISO dump size lowers). Considerable, depending on game.* '''Tools Used:''' Dolphin emulator<br 7zip/>You need to add the games in your game list under Dolphin (Configurationzip/Paths).<br gzip/>Select game in game list (you can hold Shift and select multiple ones)rar.<br />Right-click and choose "Compress selected ISOs". Choose a directory.<br />It saves a compressed GCZ copy). You might want to delete the original uncompressed ISOInstead, it utilizes its own compression method.

* '''Archive-quality dump?''' Yes for GC games, Not directly for Wii games (Can be restored with NKit).* '''Gain:''' Immediate (ISO dump size lowers). Considerable, depending on the game.* '''Tools Used:''' Dolphin (right-click the game(s) in the games list and select "Compress ISO..." (or "Compressed selected ISOs..." if more than one is selected)), [https://wiki.gbatemp.net/wiki/NKit NKit], or [https://wit.wiimm.de/ wit (Wiimms ISO Tools)]* '''Can be reverted?''' Yes. You can right-click on the GCZ-compressed (in blue) ISOs in Dolphin and choose "Uncompress selected ISOs". Garbage data is still there but for Wii titles will be zeroed out, which has and thus different from the official dump but will have no effect since it's randomized anywayson gameplay in most cases - if desired can be unscrubbed [https://gbatemp.net/threads/new-app-nkit-restore-shrink-and-preserve-disc-images-in-playable-formerly-swiit.533402/ NKitRestore].

===WBFS Scrubbing and Trimming - GC/Wii-only===* '''Archive-quality dump?''' YesNot directly, see note about reversing.* '''Gain:''' Not Immediate for just scrubbing (ISO dump size the same); Immediate for trimming (ISO dump size lowers). Considerable, depending on game.* '''Tools Used:''' GC-Tool ("wipe garbage data..." - Scrubbing for GameCube), GameCube ISO Trimmer (scrubbing and trimming for GameCube), WiiScrubber (scrubbing for Wii Backup Manager<br , although compressing with Dolphin will scrub it anyways).* '''Can be reverted?''' Yes, with WiiScrubber's undo file or NKit.* '''Playable on Hardware?''' Yes for scrubbing; some games won't work trimmed.* '''Playable on Emulators?''' Yes for scrubbing; some games won't work trimmed. Scrubbing games zeros out garbage/>Under dummy data in the ISO file. The resulting file will be the same size, but it will be able to compress better than unmodified ISOs. The difference can be huge depending on the game. Animal Crossing, for instance, will compress to just a 26 MB .gcz file after being scrubbed! Trimming (also known as "Filestrucha scrubbing" section, choose and substantially different from the definition of "Addtrimming" then choose used in ROM-based systems) games will also defragment the files moving them towards the start of the disc image, resulting in a smaller ISO file . The trimmed file can be used immediately at a smaller size without compression, but the game's internal structure will be wholly modified. '''Games relying on direct sector access (as opposed to consulting the filesystem) will break if youtrim them.'re converting'' ===WBFS - Wii only===* '''Archive-quality dump?''' Not directly, see note about reversing.<br />Tool is compatible with * '''Gain:''' Immediate (ISO, CSO (aka CISOdump size lowers) and WBFS disk dumps. When you're doneConsiderable, select depending on the ISO files you addedgame.<br * '''Tools Used:''' [http://www.wiibackupmanager.co.uk/>Under downloads.html Wii Backup Manager] (after adding your game, go to "Transfer", use the destination formatand select "WBFS") or wit (Wiimms ISO Tools).* '''Can be reverted?''' Maybe. SoWBFS files can always be converted back to ISO, in our casebut they will remain scrubbed (can be unscrubbed with NKitRestore) and, WBFS. Choose depending on settings at the directory time of conversion to save it.<br WBFS, may be missing update/>It saves extras partitions (can be laboriously readded with wit and a copy in of the WFBS missing data).* '''Playable on Hardware?''' '''Yes - Preferred format. You might want to delete by most SD/USB loaders'''* '''Playable on Emulators?''' Yes - Dolphin A scrubbed and sparse (gap-dropping) format directly derived from the one used in the original uncompressed ISOobsolete WBFS file system.

===CSO (aka CISO) - GC/Wii===* '''Archive-quality dump?''' (Gamecube) Not clear; (Wii) Not directly, see note about reversing.* '''Gain:''' Immediate (ISO dump size lowers). Less than WBFS.* '''Tools Used:''' Wii Backup Manager (same as above, but select "CISO" - possibly Wii only), wit* '''Can be reverted?''' YesMaybe. You "Add" the WBFS disk dump and "Transfer" it CISO files can always be converted back to the "ISO" format. Garbage data is still there , but zeroed out, which has no effect since it's randomized anywaysthey will remain scrubbed (can be unscrubbed with NKitRestore).* '''Playable on Hardware?''' Yes!! WBFS dumps are playable (on Wii./Vwii only) - Nintendont for Gamecube games, uLoader for Wii games

A scrubbed and sparse (gap-dropping) format. Unrelated to the PSP's CSO format. ===CSO WIA (aka CISOWii ISO Archive) - Wii-only?===* '''Archive-quality dump?''' YesNot directly unless --raw option is given, effectively preventing any space savings.

* '''Tools Used:''' Wii Backup Manager. Same as above, but "Transfer" to "CISO".wit* '''Can be reverted?''' YesMaybe. You "Add" Just as the CSO disk dump and "Transfer" it previous formats, WIA files can always be converted back to the "ISO" format. Garbage data is still there , but zeroed out, which has no effect since it's randomized anywaysthe conversion may be lossy (reversible with added work) depending on conversion settings.

Apart from its previously mentioned unscrubbing/untrimming features mentioned in the above formats' descriptions, NKit is able to convert any ISO (clean dump or otherwise) to and from an [https://wiki.gbatemp.net/wiki/NKit/NKitFormat intermediate format applying various reversible changes] that optimize the image for lossless compression, including various options such as splitting the often non-unique update partitions to separate files. ==GameBoy Wii U==All uncompressed WUD dumps are 23.3GB, which makes compression needed de facto. Some examples:* Super Mario World 3D: 23.3GB > 2.61GB (88% gain)* New Super Mario Bros. U: 23.3GB > 1.8GB (92% gain)* Donkey Kong Country Tropical Freeze: 23.3GB > 11.7GB (49% gain) ===WUX (Wii U Compressed Image Dump Archive)===* '''Archive-quality dump?''' Yes (lossless, doesn't actually alter the data).* '''Gain:''' Immediate (smaller file than WUD): Around 50% gain usually (depending on the game)* '''Tools Used:''' [http://mega.nz/#!llQwyQQZ!58fErjqM7pyQZKFKe0Qlu1yLP5EbtmOmiDUN1ElW07c wud tool]. To use, drag-and-drop the ISO on the executable.* '''Can be reverted?''' Yes. The wud tool includes a decompression utility, which recreates the original file.* '''Playable on Hardware?''' No (can be converted to an installable format using [https://github.com/FIX94/wud2app wud2app])* '''Playable on Emulators?''' Yes - Future releases of Cemu (and potentially other [[Wii U emulators]]) By Exzap, Cemu's author ([http://gbatemp.net/threads/wii-u-image-wud-compression-tool.397901/ release thread]). The tool detects duplicate sectors and only stores them once: all the empty ranges end up removed, storing only ranges which contain file or filesystem data. Of course, the original ISO can be reconstituted. ===APP (aka NUS/Installable Format)===* '''Archive-quality dump?''' No, with respect to a disc image (update partition and padding dropped); Most accurate format for CDN dumps (digital titles).* '''Gain:''' Immediate (Total size decreases, compared to disc image)* '''Tools Used:''' wud2app (disc image to APP), disc2app (original disc to APP), NUSPacker (extracted format to APP), Teconmoon's WiiVC Injector (Wii/Gamecube disc image to Enhanced Vwii APP), ...* '''Can be reverted?''' No, if starting from a WiiU disc image; Yes (see below) if starting from extracted files* '''Playable on Hardware?''' Yes (after installation)* '''Playable on Emulators?''' ? Consisting of a folder containing *.app, *.h3, title.cert, title.tik, and title.tmd files, this official Nintendo format intended for development use (and closely related to how digital titles are sold in) is equivalent to the 3DS's CIA format; however unlike a 3DS application, converting a disc title to digital does not require modifying the title itself, thus leaving the title's signatures valid. ===RPX/RPL (aka Installed/Extracted/Loadiine Format)===* '''Archive-quality dump?''' No (dump is extracted to individual files)* '''Gain:''' Immediate (Total size decreases). Can be less than a WUX depending on the game.* '''Tools Used:''' see below* '''Can be reverted?''' No, any padding/signature information is lost.* '''Playable on Hardware?''' Yes, use [https://github.com/dimok789/loadiine_gx2/releases Loadiine GX2]* '''Playable on Emulators?''' Yes Titles installed to USB or MLC are stored in this format, comprised of three "code", "content", and "meta" folders. Can be extracted from disc images with DiscU, UWizard ([http://digiex.net/guides-reviews/console-guides/nintendo-wii-u-guides/14680-wii-u-wud-loadiine-gx2-conversion-extract-wud-images-loadiine-use.html follow this guide for usage information]) or JWUDTool, and from the installable format using JNUSTool. Can be converted to installable format with NUSPacker. Ideal format for game modding, less so for playing on console due to Loadiine's intrinsic modus operandi (appearing to the OS as the host title, with potentially different permissions) leading to poor compatibility. ==Game Boy Advance / Nintendo DS / Nintendo 3DS==

* '''Archive-quality dump?''' ABSOLUTELY NOTNo (data removed)

* '''Tools Used:''' NDSTokyoTrim (GBA/DS/3DS), rom_tool (3DS), GodMode9 (can directly dump DS/3DS cards in trimmed format)<br />NDSTokyoTrim: Drag-and-drop roms, and press "Trim". The original file will be overwritten! * '''Can be reverted?''' No. Sometimes it damages Some GBA/DS games may be broken by meaningful data at the game's functionality irreversiblyend of the ROM being mistaken for padding.

While Trimming involves deleting bytes from the end of the ROM up to until the first different one. However, with no mandatory allocation table, it doesn't affect s not intrinsecally possible to identify the true end of the gameused area, and therefore some GBA/DS games can be broken by naive automated trimming (for example Golden Sun DS). ===CIA (CTR Importable Archive, 3DS and DSiWare only)===* '''Archive-quality dump?'''s functionality by much other than being No (data removed and edited), compared to a gamecard dump. Potentially most accurate format for CDN (digitally distributed) titles.* '''Gain:''' Immediate (smaller regular than original ROM- not applicable to digital titles).* '''Tools Used:''' GodMode9 (can directly dump 3DS cards or installed titles to CIA, as well as converting 3DS to CIA), 3dsconv or 3DS Simple CIA Converter 5.0+ (3DS rom to CIA); makerom (3DS to/from CIA, itNCCHs/DSiWare/ELF+RSF to 3DS/CIA), make_cia (DSiWare to CIA)* '''Can be reverted?''' No, if starting from a gamecard dump (update partitions removed, main content's not advisable though ExHeader modified to change the media type from CARD/NAND to trim in many casesSD Application)* '''Playable on Hardware?''' Yes, including GBA games in generalafter installation. Rebuilding * '''Playable on Emulators?''' Yes? Official Nintendo format for developers to install digital titles, later became the internal structure most popular format for installable homebrew and game backups owing to the relatively low marketshare of flashcards and emulators (and, for the rom might even destroy the gameformer, strong impopularity) in favor of CFW.  ===NCCHs (CXIs and CFAs, 3DS only)===* '''Archive-quality dump?''' No (partition table/ticket/signatures... removed), compared to CCI/3DS and CIA* '''Gain:''' Immediate (smaller than original ROM - not applicable to digital titles).* '''Tools Used:''' GodMode9, ctrtool, ...* '''Can be reverted?''' No (result will be unsigned)* '''Playable on Hardware?''' Not really, unless packaged back into a CIA or 3DS.* '''Playable on Emulators?'''s functionality in Yes 3DS and CIA files, as well as already installed digital titles, are comprised of one or more NCCHs (also called "partitions" or "contents"): the few games where it does matter main content (number 0) can either be an executable CXI for example Golden Sun DS)software, or a non-executable CFA for a data title. Additional CFAs may be present, [https://www.3dbrew.org/wiki/NCSD#Overview with conventional index numbers]. [[Citra]] can run CXIs directly.

It's certainly better than keeping 8.5GB images, but the conversion is too substantial and irreversible to be suitable for archival purposes, since it affects data structure tables as well.

* '''Archive-quality dump?''' ABSOLUTELY NOTNo (dump is collapsed to individual files)

* '''Playable on Hardware?''' Probably NotYes. Using a JTAG or RGH exploited console.

* '''Archive-quality dump?''' ABSOLUTELY NOTNo (missing data)

* '''Tools Used:''' ISO2GOD (also a "Games on Demand" X360 image convertorconverter). <br />Under Settings, set the output and rebuild path to the same location. Check "Always save rebuilt ISO" and set Padding to "Full (ISO Rebuild)", then save changes.<br />"Add ISO", and press "Convert". Keep generated ISO, and delete generated folder.

* '''Archive-quality dump?''' Yes ==LET'S PLAY GAME BUTCHERING GAMEDestructive Modification==Of course, there are also the devs who don't merely use garbage data for padding, but also bloat '''the game data part'''. For instance, Tengai Makyou IV many PSP has JRPGs have a specific FMV movie duplicated a dozen times, and the Megaman Collection on GC stores its sound data using an uncompressed format bringing the size of that portion alone to 1GB. In many of these cases, there's just not much you can do about it without destructively altering game data.

So what do some people do? Note when I say "delete" it often means replacing the file with a 1KB dummy file to prevent the ISO file structure from collapsing on itself. Of course, but sometimes such care isn't even put into ensuring it's not like some idiots care anyways about keeping the thing still in a semi-playable functional state.* They delete all videos: this brings Super Smash Bros Brawl to 4.7GB.* They delete all voice acting and occasionally sound and musicSome examples: this brings Xenoblade PAL to 4.2 GB with even only one of both dubs removed.* They delete unused content you could get with emulator cheats like rooms and stuff* They delete "extra" languages other than English* If game has multiple quests, they delete some characters / quests they don't like. Especially seen in compilations and stuff with demos included.

Since * delete all videos: this results in most of the case in very noticeable detrimental effects in gameplay (if the game doesn't crash outright), brings Super Smash Bros Brawl to 4.7GB.* delete all voice acting and occasionally sound and music: this is nothing short brings Xenoblade PAL to 4.2 GB with even only one of mutilating the game image, both dubs removed.* delete unused content you could get with emulator cheats like rooms and the fuckers doing this then instead of keeping it for personal use are instead uploading the game to stuff* delete "archiveextra" it (bonus points if they remove chunks from the languages other than English* If a game to make room for a shitty intro screen) while being proud of themselveshas multiple quests, have a special spot they delete some characters/quests they don't like. Especially seen in Hellcompilations and stuff with demos included.

tl;dr: AvoidTools used for this are modding tools for rebuilding file trees, like UMDGen (PSP), Tinke (DS) and also regular ISO tools (PS1, Saturn)...

This page was based partially on Since this results in most of the case in very noticeable detrimental effects in gameplay (if the game doesn't crash outright), this is nothing short of mutilating the game image. Some of these dumps make it to sharing sites sadly enough. Avoid resorting to destructive modifications since it can lead to random crashes and unexpected behavior, especially in games with lots of shared assets. [https[http://wwwemulation.redditgametechwiki.com/rindex.php/emulation/comments/3g933n/guide_reduce_the_size_of_your_ps2_gc_wii_x360_ds/ guideFile_Hashes Verify]]your dumps to make sure you don't have these, and if you want to compress those prefer other methods or using decompression on demand. One reason to use a destructively modified dump is for burning your own Dreamcast games, as GD-ROMs were over a gigabyte in size and CD-Rs top out at 850MB. * '''Archive-quality dump?''' No (destructive mod) [[Category:FAQs]]