DiscImageCreator (Page 44 of 141)

The new test version dumps the disc correctly, thanks!

*2017-08-18
- added: adr 06 of the subchannel (some Amiga CDTV disc)
- added: No data track but there is some data sector (some CD-i disc)
- added: Corrupted directory record disc (Amiga tools 4)
- changed: Some log message
- changed: the max size to search the exe file when use /sf option (1024 -> 4096)
- fixed: Disc that the session 2 starts from the track 2
- fixed: Descrambling of some mastering error disc

*2017-09-01 test
- changed: some DVD, DVD-R, timestamp of disc log
- improved: checking argument

Please also check by IsoBuster. /c writes the protected sector number to file. /f deletes the drive cache when reads the disc.

Or developer may hide some file intendedly.

Nexy screamed about the similar case from http://forum.redump.org/post/46803/#p46803 to http://forum.redump.org/post/46989/#p46989

Another problem (sorry I didn't check entire topic, I may repeated problem already mentioned).

When I use command like:
cd D:
D:\DICnew\DIC.exe cd w GAME 32 /c2 /sf

program crash when "Creating bin, cue and ccd..."

EDIT. Ignore it, works like this nicely:

cd D:
DIC.exe cd w Game\GameDisc 32 /c2 /sf

If there isn't any protection, it'll work. Please try and report.

No.

See this. http://forum.redump.org/post/55585/#p55585
I want more report about this protection.

redump.org/disc/32765/

Aug 18 2017 00:05:27
DiscImageCreator cd x \raw\raw_PX-760A 8 /c2 /q /p /raw 

Main channel is shifted by 30 samples forwards

As a note:

• subs leadin and the first 75 sectors are filled with repeating pattern

DIC logs

This most likely means you were low on hard drive space.

I checked idlord's logs and the issue is because subchannels are corrupted.

Listing the different protection schemes for the 8 subcoding channels...
Channel P: no protection, Channel Q: 16-bit CRC, Channels R to W:

[FONT=Arial][SIZE=2][SIZE=2][FONT=Arial][SIZE=2][FONT=Arial]To protect the data in the subcoding channels R to W, a (24, 20) Reed-Solomon error correction code is used. To improve the burst error correction capability, 8 times interleaving is added to this error-correction system. The first two symbols in a PACK have additional protection with a (4, 2) Reed-Solomon error correction code.
[/FONT][/SIZE][/SIZE][/FONT][/SIZE][/FONT]

https://club.myce.com/t/subchannel-issues/195516/9

Sarami maybe you could take the CRC16 from Sub Q and attempt to detect single bit errors by bit swapping each bit in Sub Q and checking if CRC16 matches (CRC16 could also be corrupted). cdgtool is using such approach to clean the subs for random bit errors. Could you implement this simple algorithm. That could solve issue with such rotting CDs...

I'm not the original dumper, I only saw the logs. In idlord's case /s 2 didn't help. In one of the logs you output a table describing TOC with pregap and this table is computed using RMSF in SubQ, yes? The problem with the CD is that RMSF in Q channel is bad but not random. For example at some point (say LBA 90000), RMSF is changed to some low value like 00:24:24 and goes up on each frame. After some sectors it restarts again and goes up.

RMSF goes 1 frame up with each sector (it's good) but the value is shifted and it screwes everything...