Redump.org - Revision history

Darksabre76 at 23:33, 28 December 2025

2025-12-28T23:33:25Z

← Older revision		Revision as of 23:33, 28 December 2025
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	'''Why do I need special software to dump [x] media for Redump?'''		'''Why do I need special software to dump [x] media for Redump?'''

-	:The dumping programs that are we use are tailored to trying to get as much information out of a disc as possible. A lot of discs are even designed to make it harder to get an accurate copy. The primary dumping tools we support on desktop systems are '''Redumper''' and '''DiscImageCreator'''. Both have periodic official releases through their own GitHub repos as well as being included with the MPF frontend. Only official releases through one of these two sources are allowed for submission as we need some reasonable degree of confidence that the outputs are accurate. For systems that are not supported (e.g. some Linux distros or BSDs in general), please check with a staff member before submitting using a custom build.	+	:The dumping programs that are we use are tailored to trying to get as much information out of a disc as possible. A lot of discs are even designed to make it harder to get an accurate copy. The primary dumping tools we support on desktop systems are '''Redumper''' and '''DiscImageCreator'''. Both have periodic official releases through their own GitHub repos as well as being included with the MPF frontend. Only official releases through one of these two sources are allowed for submission as we need some reasonable degree of confidence that the outputs are accurate. For systems that are not supported (e.g. some Linux distros or BSDs in general), please check with a staff member before submitting using a custom build or an official build that has been modified. We trust users to be reasonably transparent about this to avoid having to overly-scrutinize all submissions.

	'''What is a pressed disc?'''		'''What is a pressed disc?'''

Darksabre76: /* Technical Questions */

2025-12-28T22:27:51Z

Technical Questions

← Older revision		Revision as of 22:27, 28 December 2025
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	'''Why do I need special software to dump [x] media for Redump?'''		'''Why do I need special software to dump [x] media for Redump?'''

-	:The dumping programs that are we use are tailored to trying to get as much information out of a disc as possible. A lot of discs are even designed to make it harder to get an accurate copy. The primary dumping tools we support on desktop systems are Redumper and DiscImageCreator. Both have periodic official releases through their own GitHub repos as well as being included with the MPF frontend. Only official releases through one of these two sources are allowed for submission as we need some reasonable degree of confidence that the outputs are accurate. For systems that are not supported (e.g. some Linux distros or BSDs in general), please check with a staff member before submitting using a custom build.	+	:The dumping programs that are we use are tailored to trying to get as much information out of a disc as possible. A lot of discs are even designed to make it harder to get an accurate copy. The primary dumping tools we support on desktop systems are '''Redumper''' and '''DiscImageCreator'''. Both have periodic official releases through their own GitHub repos as well as being included with the MPF frontend. Only official releases through one of these two sources are allowed for submission as we need some reasonable degree of confidence that the outputs are accurate. For systems that are not supported (e.g. some Linux distros or BSDs in general), please check with a staff member before submitting using a custom build.

	'''What is a pressed disc?'''		'''What is a pressed disc?'''

Darksabre76: /* Technical Questions */

2025-12-28T22:27:12Z

Technical Questions

← Older revision		Revision as of 22:27, 28 December 2025
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	:CDs, DVDs, GDs, NODs, UMDs, Blu-ray discs, etc. If it spins, is read by a laser and has digital game data on it; we want to preserve it.		:CDs, DVDs, GDs, NODs, UMDs, Blu-ray discs, etc. If it spins, is read by a laser and has digital game data on it; we want to preserve it.
		+	Redump

	'''Why do I need special hardware to dump [x] media for redump?'''		'''Why do I need special hardware to dump [x] media for redump?'''

	:Discs, particularly CD-ROMs, are somewhat complicated and have data on them that can't be read by just any drive or software, including data that is required for certain games to function properly (e.g. copy protected games). The drives we recommend are capable of reading more information than most standard drives, which helps us to preserve a more complete digital image of the media, for posterity. Additionally, the drives we've listed as compatible, have undergone significant testing by hundreds of contributors, over many years, with tens of thousands of discs, enabling us to provide reliable hashes and in many cases, verified hashes, which fulfills the main purpose of this project.		:Discs, particularly CD-ROMs, are somewhat complicated and have data on them that can't be read by just any drive or software, including data that is required for certain games to function properly (e.g. copy protected games). The drives we recommend are capable of reading more information than most standard drives, which helps us to preserve a more complete digital image of the media, for posterity. Additionally, the drives we've listed as compatible, have undergone significant testing by hundreds of contributors, over many years, with tens of thousands of discs, enabling us to provide reliable hashes and in many cases, verified hashes, which fulfills the main purpose of this project.
		+
		+	'''Why do I need special software to dump [x] media for Redump?'''
		+
		+	:The dumping programs that are we use are tailored to trying to get as much information out of a disc as possible. A lot of discs are even designed to make it harder to get an accurate copy. The primary dumping tools we support on desktop systems are Redumper and DiscImageCreator. Both have periodic official releases through their own GitHub repos as well as being included with the MPF frontend. Only official releases through one of these two sources are allowed for submission as we need some reasonable degree of confidence that the outputs are accurate. For systems that are not supported (e.g. some Linux distros or BSDs in general), please check with a staff member before submitting using a custom build.

	'''What is a pressed disc?'''		'''What is a pressed disc?'''

Sadikyo at 11:23, 11 June 2025

2025-06-11T11:23:30Z

← Older revision		Revision as of 11:23, 11 June 2025
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	:Burned recordable discs (CD-Rs, DVD-Rs, etc) are accepted as well when they contain prerelease content or if they were released in this form by their publisher. These still must be video game related in their content.		:Burned recordable discs (CD-Rs, DVD-Rs, etc) are accepted as well when they contain prerelease content or if they were released in this form by their publisher. These still must be video game related in their content.

-	:If you have any questions about whether your disc is eligible, please post your question in the [http://forum.redump.org/ forum].	+	:If you have any questions about whether your disc is eligible, please post your question in the [http://forum.redump.org/topic/63134/disc-eligibility-questions/ forum].

	'''What do you mean by "video game related?"'''		'''What do you mean by "video game related?"'''

Deterous at 05:27, 29 January 2025

2025-01-29T05:27:09Z

← Older revision		Revision as of 05:27, 29 January 2025
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	:"Pressed" discs are stamped out in a plastics-molding stamper. The data patterns, represented as a series of pits and lands, is permanently molded into the plastic during the stamping process. Basically, its the same process that was used to make vinyl records (and CD's, for that matter), just ramped up a few orders of magnitude in precision. After the plastic has been stamped, it then gets coated (via vacuum deposition) with a few-atoms-thick layer of reflective metal, and another layer of plastic is bonded onto the top. During playback, the laser's reflection angle is subtly altered depending on whether there's a pit or a land in front of the beam, which causes the reflection to hit or miss the detector. These hits and misses become a binary data pattern.		:"Pressed" discs are stamped out in a plastics-molding stamper. The data patterns, represented as a series of pits and lands, is permanently molded into the plastic during the stamping process. Basically, its the same process that was used to make vinyl records (and CD's, for that matter), just ramped up a few orders of magnitude in precision. After the plastic has been stamped, it then gets coated (via vacuum deposition) with a few-atoms-thick layer of reflective metal, and another layer of plastic is bonded onto the top. During playback, the laser's reflection angle is subtly altered depending on whether there's a pit or a land in front of the beam, which causes the reflection to hit or miss the detector. These hits and misses become a binary data pattern.
-
-	~~'''Why you split the tracks?'''~~
-
-	~~:wip~~
-
-	~~'''What is offset and why is it important?'''~~
-
-	~~:wip~~
-
-	~~'''Why dump at 2352 bytes per sector and not 2048 bytes?'''~~
-
-	~~:wip~~
-
-	~~'''Why don't you dump subchannels?'''~~
-
-	~~:wip~~

	'''Is it true that some data on a disc can't be accurately copied?'''		'''Is it true that some data on a disc can't be accurately copied?'''

Sadikyo at 15:03, 8 January 2025

2025-01-08T15:03:05Z

← Older revision		Revision as of 15:03, 8 January 2025
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	:Verifications are vital in verifying that the information in the database is accurate, and that a dump is reproduceable by another person using the same tools and methods. An existing dump could be erroneous due to a variety of factors, including user error, hardware and software issues, and more. Furthermore, even when someone is doing everything correctly and has adequate software and hardware, there is a chance that their dump could be incorrect, due to the way data sectors on a disc are read and validated (especially Compact Discs). In most cases, the data will be read and verified successfully, but the process of reading data is not infallible, so there are times when a second dump of the same disc could provide differing information. Verifications help to identify and correct some of these issues.		:Verifications are vital in verifying that the information in the database is accurate, and that a dump is reproduceable by another person using the same tools and methods. An existing dump could be erroneous due to a variety of factors, including user error, hardware and software issues, and more. Furthermore, even when someone is doing everything correctly and has adequate software and hardware, there is a chance that their dump could be incorrect, due to the way data sectors on a disc are read and validated (especially Compact Discs). In most cases, the data will be read and verified successfully, but the process of reading data is not infallible, so there are times when a second dump of the same disc could provide differing information. Verifications help to identify and correct some of these issues.

-	'''Does ~~redump~~ 'own' the content we contribute to the database?'''	+	'''Does Redump.org 'own' the content we contribute to the database?'''

-	:No, the metadata that is contributed to and stored on ~~redump~~, is considered publicly available information to be used however people see fit - whether you are a researcher, academic, organization, or simply an individual verifying the data for your own media.	+	:No, the metadata that is contributed to and stored on Redump.org, is considered publicly available information to be used however people see fit - whether you are a researcher, academic, organization, or simply an individual verifying the data for your own media.

	==Technical Questions==		==Technical Questions==

Sadikyo at 14:59, 8 January 2025

2025-01-08T14:59:00Z

← Older revision		Revision as of 14:59, 8 January 2025
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	'''Why are "verifications" necessary and/or helpful to the project? Isn't one dump good enough?'''		'''Why are "verifications" necessary and/or helpful to the project? Isn't one dump good enough?'''
	:Verifications are vital in verifying that the information in the database is accurate, and that a dump is reproduceable by another person using the same tools and methods. An existing dump could be erroneous due to a variety of factors, including user error, hardware and software issues, and more. Furthermore, even when someone is doing everything correctly and has adequate software and hardware, there is a chance that their dump could be incorrect, due to the way data sectors on a disc are read and validated (especially Compact Discs). In most cases, the data will be read and verified successfully, but the process of reading data is not infallible, so there are times when a second dump of the same disc could provide differing information. Verifications help to identify and correct some of these issues.		:Verifications are vital in verifying that the information in the database is accurate, and that a dump is reproduceable by another person using the same tools and methods. An existing dump could be erroneous due to a variety of factors, including user error, hardware and software issues, and more. Furthermore, even when someone is doing everything correctly and has adequate software and hardware, there is a chance that their dump could be incorrect, due to the way data sectors on a disc are read and validated (especially Compact Discs). In most cases, the data will be read and verified successfully, but the process of reading data is not infallible, so there are times when a second dump of the same disc could provide differing information. Verifications help to identify and correct some of these issues.
		+
		+	'''Does redump 'own' the content we contribute to the database?'''
		+
		+	:No, the metadata that is contributed to and stored on redump, is considered publicly available information to be used however people see fit - whether you are a researcher, academic, organization, or simply an individual verifying the data for your own media.

	==Technical Questions==		==Technical Questions==

Sadikyo: /* Overview */

2023-05-08T01:19:55Z

Overview

← Older revision		Revision as of 01:19, 8 May 2023
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	:Most other projects encourage you to backup your discs in such a way that data is lost. Our methods of preservation try to backup every bit of data contained on the disc. In this way your dump should be as close to a 1:1 copy as possible. More information about our methods is covered in the '''Technical''' section below.		:Most other projects encourage you to backup your discs in such a way that data is lost. Our methods of preservation try to backup every bit of data contained on the disc. In this way your dump should be as close to a 1:1 copy as possible. More information about our methods is covered in the '''Technical''' section below.
		+
		+	'''Why are "verifications" necessary and/or helpful to the project? Isn't one dump good enough?'''
		+	:Verifications are vital in verifying that the information in the database is accurate, and that a dump is reproduceable by another person using the same tools and methods. An existing dump could be erroneous due to a variety of factors, including user error, hardware and software issues, and more. Furthermore, even when someone is doing everything correctly and has adequate software and hardware, there is a chance that their dump could be incorrect, due to the way data sectors on a disc are read and validated (especially Compact Discs). In most cases, the data will be read and verified successfully, but the process of reading data is not infallible, so there are times when a second dump of the same disc could provide differing information. Verifications help to identify and correct some of these issues.

	==Technical Questions==		==Technical Questions==

Sadikyo: Protected "Redump.org" ([edit=sysop] (indefinite) [move=sysop] (indefinite))

2023-02-14T12:59:15Z

Protected "Redump.org" ([edit=sysop] (indefinite) [move=sysop] (indefinite))

← Older revision

Revision as of 12:59, 14 February 2023

Mictlantecuhtle: /* Contributing Questions */

2023-01-23T15:14:26Z

Contributing Questions

← Older revision		Revision as of 15:14, 23 January 2023
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	* (PC) Press Kit discs for video games, demos, promotional materials on discs, etc.		* (PC) Press Kit discs for video games, demos, promotional materials on discs, etc.
-	* (DVD-Video) Promotional DVDs highlighting demos, trailers or gameplay for video games. DVD-Video Interactive games (~~stand-alone~~ games).	+	* (DVD-Video) Promotional DVDs highlighting demos, trailers or gameplay for video games. DVD-Video Interactive games (dedicated games which can be played using only DVD-Video hardware).
	* (Audio CD) Video game soundtracks, compilations, etc.		* (Audio CD) Video game soundtracks, compilations, etc.