(specifically redump.org) is a specialized disc preservation project and community database dedicated to cataloging and verifying optical disc data. Its primary goal is to ensure that backups of physical media—such as CDs, DVDs, and Blu-rays for video games and software—are bit-perfect "1:1" copies of the original retail versions. Core Purpose and Methodology
Once a disc is processed, DIC generates a set of image files (typically .bin and .cue for CDs, or .iso for DVDs) alongside a text file containing vital metadata. The crucial identifiers are the cryptographic hash signatures: (Cyclic Redundancy Check) MD5 (Message-Digest Algorithm 5) SHA-1 (Secure Hash Algorithm 1)
The community follows strict dumping methods, often requiring specific hardware like compatible Blu-ray or DVD drives and specialized software like DiscImageCreator .
Unlike scene releases, Redump images do not contain cracks, trainer menus, or hacks. redump
Not all optical drives are created equal. Redump community members actively maintain hardware lists tracking specific drive models capable of reading subchannel data and precise lead-in/lead-out structures. Legacy drives like the Plextor Premium series or specific LG and Lite-On models are highly prized because they allow raw, unaltered reads of uncorrected data sectors. 2. Determining Read Offset
Using specialized software, the drive reads the disc at low, stable speeds. The software extracts the data tracks (usually saved as a .bin file) and the structural layout of the disc (saved as a .cue file). 3. Verification via Cryptographic Hashes
Are you interested in your own physical discs? (specifically redump
Specialized software (redumper CLI, DiscImageCreator) is used to read discs accurately, including those with tricky copy protection.
Together, these two projects form the backbone of modern emulation. Tools like the LaunchBox ROM Import Guide rely on these DAT files to help users organize their collections and verify that their files are official, uncorrupted releases. How to Get Involved
When a casual user copies a CD to an ISO file using standard software, the computer often ignores or automatically corrects minor read errors, fills missing data with zeroes, or skips complex copy-protection data. For casual emulation, this is often "good enough." for historians and developers
Redump changed the landscape by introducing three core requirements:
Border regions on a disc containing track structures.
The Redump project has made significant progress since its inception:
Their primary mission is to ensure that a "dump" (a digital copy) of a disc is accurate. Because optical discs can have read errors or small manufacturing variations, Redump requires multiple users to submit identical results for the same disc before it is marked as "verified." This rigorous process eliminates the risk of bad sectors or "dirty" data polluting the historical record. The Philosophy of "Bit-Perfect" Archiving
For the average user, a compressed or slightly altered file might work fine in an emulator. However, for historians and developers, bit-perfect copies are essential: