Search options (Page 2 of 4)

Work to support automatic/semi-automatic dumping of ring protection (or a subset of ring protection) is being done in redumper.

Until then, this is the guide you should follow for ringed discs. It is not for the faint of heart, takes a lot of time and effort:
http://www.wiki.redump.org/index.php?ti … ping_Guide

This specific version of this specific DRM seems to intentionally set the user data of sectors 299-1498 such that the scrambled data physically on the disc is all 0x00. During reading with a plextor, 16 sectors in that range give C2 errors, and additional non-C2 sectors in that range provide inconsistent data (non-reproducible hashes). The ASUS dumps also return those 16 C2 errors, as well as an additional 16 C2 errors (covering the locations of inconsistent sectors for the plextor).

[TECHNICAL DETAILS]
In the absence of better dumping hardware (EFM dumps, etc), I can only speculate as to the cause. My best guess is that the DRM is designed to make creating CD-Rs difficult, or make CD-Rs unplayable due to how burners at the time would have dealt with this intentional mastering 'error'. From the reading perspective, the drives may be getting invalid Digital Sum Values from all the 0x00 (similar to safedisc weak sectors), or something like that, resulting in C2 errors and inconsistencies.
[/TECHNICAL DETAILS]

I suggest for this protection scheme that the sectors in the 299-1198 range should be manually fixed to have valid sync headers, linearly incrementing MSF and scrambled 0x00 user data (Mode 2 Form 2), with 0x00 EDC, as it seems that is what is actually on the disc (but our drives are unable to read it). Based on prior inspection there are likely 20 or so sectors that need fixing, around LBA 300-370 (location differs for each dump on Plextors), or in the case of the ASUS dumps, the 32ish C2 errors need fixing in the way I described.

This can all be accomplished automatically by dumping with an ASUS drive and modified redumper that fills in C2 errors with fixed MSF and scrambled 0x00, rather than the default 0x55

I confirmed that dumping an Audio CD with an illegal toc (e.g. CDS200) with a Plextor W4824 works when providing the /fulltoc flag.
Thank you sarami.

I'm still interested to know if anyone else can replicate Securom issues with the 4824. (I did not find anything)

Hi, in the meantime you can download dats and cues from the mirror site: https://redump.info/downloads/

Https point 1: Yes, I understand that it can happen, I'm not suggesting that sticking to http-only is good, just that it's okay to use the site. You can use the site under sandbox if you are that paranoid, but the risk of that is way lower than many other threat vectors.
Https point 2: I understand you said it was unlikely but that scenario is hilarious. No-one is going through the effort to hijack http just for that

Even if you were to construct a file with identical size and three hashes (not feasible), you would also have to make the structure of the dump contents look correct. Besides, we want checksums, not secure cryptographic hashes. The hashes are to protect against read errors during a dump, not against someone constructing a file to match the hashes. Redump does not share ISOs.

All of this is besides the central point that we cannot change the redump.org website functionality at the moment because the website owner is AWOL

Yes, it is an MPF issue. I have logged a request to fix it. Thanks

sarami, your github README mentions that 4824 is not good for "Securom 3"

Which particular discs did you encounter that had issues? I have not encountered any yet.

Also, regarding CDS100/CDS200/Label Gate/XCP, using the Full TOC works with the 4824 to get matching hashes. And only XCP1 has illegal TOC (retail XCP discs use XCP2 which does not have an illegal TOC, 4824 has no problems with them).

We do not provide any downloads of copyrighted materials. You cannot download ISOs/ROMs on this site. You can sign up if you have eligble discs you wish to contribute hashes for by dumping them with compatible drives and software.

Hello, your account will be made once an admin can get to it.
In the meantime, if you'd like to discuss Korean PS2 please get in touch with me via the VGPC discord: https://discord.gg/AHTfxQV
I manage the Korean PS2 missing lists and can help you source some games if you live outside of Korea.

Heya, thanks for posting.

We only add ringcode info for discs that have been dumped and confirmed to match. While it's extremely likely that your disc matches the one in redump, unfortunately your ringcode can't be added unless it was dumped to our standards. This is to ensure that all the data in redump is accurate and trustworthy.
If you do ever get the ability to dump the disc (easiest method is with a homebrew Wii) then let us know and it can be added.

Do you own physical discs and have a method of dumping them in order to contribute to redump?

The game in question: http://redump.org/disc/33636/
The game did not have any languages listed before.
I have confirmed it only has Spanish in-game and have updated the entry.
As there is only one language present, the dat name has not changed.