Redump Forum

Disc Preservation Community
https://forum.redump.info/

DiscImageCreator

https://forum.redump.info/viewtopic.php?t=7568

Page 294 of 354

Re: DiscImageCreator

Posted: Fri Jul 16, 2021 10:23 am
by user7
user7 wrote:7th Guest CDi is dumping differently on Plextor 716 vs 755. Many dumps, same results when i dump on same drive - but results don't match other drive.

https://drive.google.com/file/d/1ltSRfY … sp=sharing
https://drive.google.com/file/d/1fV22FM … sp=sharing

My edition is White Label Demonstration Disc, but has the same ring code as retail https://redump.info/disc/78871/
But different hashes.


I see this in command line:

Code: Select all

Checking sectors: 307875/307875
[ERROR] Number of sector(s) where bad MSF: 2
[INFO] Number of sector(s) where EDC doesn't exist: 297394
[ERROR] Number of sector(s) where mode2 NoEdc subheader(0x10 - 0x17) isn't same: 1
Asus /mr dump fails on a clean disc https://drive.google.com/file/d/1MeBc5R … sp=sharing

I think Asus just doesn't like CD-i mastering errors?


This Plextor dump matches redump and has the fewest main errors, I think it may be correct? https://drive.google.com/file/d/1ltSRfY … kt6ey/view
At least one other version of 7th Guest has these same-looking main errors which makes me think this one is dumped as good.

Re: DiscImageCreator

Posted: Fri Jul 16, 2021 11:28 am
by sarami
user7 wrote:I think it may be correct?
Yes.
user7 wrote:I think Asus just doesn't like CD-i mastering errors?
It's not related. Your disc is a little bad condition. Disc has c2 errors.
PX716 is no c2 error.

PX755

Code: Select all

                 ofs: 474, 475, 47d, 486, 487, 535, 53e, 53f, 5f6, 5f7, 692, 693, 6c4, 6c5, 74a, 74b, 753, 77c, 77d, 802, 803, 80b, 834, 835, 
 LBA[306465, 0x4ad21] Detected C2 error 24 bit
LBA[306465, 0x4ad21]: crc32[000]: 0x434dcf1a good. Rewrote .scm[720805560-720807911(2af69eb8-2af6a7e7)] .c2[90100695-90100988(55ed3d7-55ed4fc)]
Asus

Code: Select all

                 ofs: 814, 815, 81d, 826, 827, 874, 875, 87e, 887, 8d5, 8de, 8df, 
 LBA[306443, 0x4ad0b] Detected C2 error 12 bit
                 ofs: 6, f, 66, 67, a2, c7, d4, 102, 103, 134, 135, 15a, 162, 163, 18c, 195, 1ba, 1bb, 1c3, 1ec, 1ed, 212, 21a, 21b, 244, 24d, 272, 273, 27b, 2a4, 2a5, 2d2, 2d3, 2e0, 305, 333, 340, 341, 398, 3a0, 3a1, 3f8, 3f9, 401, 450, 458, 459, 462, 4b0, 4b1, 4b9, 4c2, 4c3, 
 LBA[306444, 0x4ad0c] Detected C2 error 53 bit
                 ofs: 91c, 927, 92e, 92f, 
 LBA[307651, 0x4b1c3] Detected C2 error 4 bit
                 ofs: 4d, 4e, 56, 5f, af, b6, b7, 10e, 117, 11c, 14a, 16e, 16f, 17d, 1ab, 1cf, 1d4, 1dc, 202, 20a, 235, 23c, 23d, 263, 26b, 28c, 294, 29d, 2ba, 2c2, 2ed, 2f4, 2f5, 31b, 323, 34c, 355, 37a, 388, 3ac, 3ad, 3db, 3e9, 40d, 440, 448, 4a1, 4a9, 4aa, 4f8, 500, 50b, 559, 561, 562, 56a, 
 LBA[307652, 0x4b1c4] Detected C2 error 56 bit
LBA[306443, 0x4ad0b]: crc32[000]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[001]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[002]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[003]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[004]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[005]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[006]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[007]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[008]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[009]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[010]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[011]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[012]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[013]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[014]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[015]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[016]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[017]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[018]: 0x67b726fc bad
LBA[306443, 0x4ad0b]: crc32[019]: 0x67b726fc 
bad all. need to reread more

Re: DiscImageCreator

Posted: Fri Jul 16, 2021 9:14 pm
by user7
sarami wrote:PX716 is no c2 error.
No C2 error but "main error" txt is why i thought mastering errors.

Re: DiscImageCreator

Posted: Sat Jul 17, 2021 4:08 pm
by user7
A new CDi dump giving issues https://drive.google.com/file/d/1FEVCLK … sp=sharing

Never seen something like this before. The filesystem of the dump is empty. IsoBuster dump has edcchk errors too but has files in the filesystem.

Re: DiscImageCreator

Posted: Sun Jul 18, 2021 4:31 am
by sarami
user7 wrote:A new CDi dump giving issues https://drive.google.com/file/d/1FEVCLK … sp=sharing

Never seen something like this before. The filesystem of the dump is empty. IsoBuster dump has edcchk errors too but has files in the filesystem.
LBA 950 ... last are all shifted because LBA 949 is mastering error (2352 + 120 bytes).

Re: DiscImageCreator

Posted: Sun Jul 18, 2021 11:10 am
by user7
Anything can be done? or forever Non-Redump? This is a very rare Philips CD-i Japanese demo so would be nice to save if possible.

Re: DiscImageCreator

Posted: Sun Jul 18, 2021 7:18 pm
by sarami
user7 wrote:Anything can be done? or forever Non-Redump? This is a very rare Philips CD-i Japanese demo so would be nice to save if possible.
As with the Maddog's dump, the opinion of admin and moderator is needed.

Re: DiscImageCreator

Posted: Tue Jul 20, 2021 8:23 pm
by iR0b0t
user7 wrote:Anything can be done? or forever Non-Redump? This is a very rare Philips CD-i Japanese demo so would be nice to save if possible.
Can be dumped with disc swap method, or do a manual scrambled dump.

Can it not be descrambled or what is the issue?

Re: DiscImageCreator

Posted: Tue Jul 20, 2021 9:23 pm
by user7
When I descrambled the scm the filesystem was empty. But isobuster dump has files in it (isobuster flagged a read issue too).

Re: DiscImageCreator

Posted: Wed Jul 21, 2021 4:24 am
by sarami
iR0b0t wrote:Can it not be descrambled or what is the issue?
Some CD-i discs have a similar problem to FMT discs.
* https://redump.info/disc/45432/
* https://redump.info/disc/70481/
* https://redump.info/disc/73334/
These 3 titles have 2 write offset due to the mastering issue of the pregap sector. 1st write offset is used by the pregap sector only, so DIC descramble the main (non-pregap) sector using the 2nd write offset.

CD-i discs that user7 reported have also 2 write offset due to the mastering issue of the main sector.
e.g. https://drive.google.com/file/d/1FEVCLK … sp=sharing
To descramble all sector
1. descramble LBA 0 to LBA 948 using 1st write offset.
2. descramble LBA 950 to last sector using 2nd write offset.
3. pad all 0 bytes and put in LBA 949.
    or cut the excessive 120 bytes of LBA 949.
All times are UTC
Page 294 of 354

Powered by phpBB® Forum Software © phpBB Limited