On 2013-01-22 21:42, Filipus Klutiero wrote:
On 2013-01-20 17:26, gregor herrmann wrote:
On Sun, 20 Jan 2013 12:56:22 -0500, Filipus Klutiero wrote:
I tested cdck with a number of DVDs I have under the hand and
Not sure I have any DVDs here to test ...
it
failed with a lot (for roughly half of DVDs) right from the
beginning, always with the same error:
Disc status: data mode 1
Multisession: 0
Audio status: failed to get, reason: No medium found
Try to find out what sort of CD this is...
CD-ROM with unknown filesystem
Ok, "unknwon filesystem" might be an interesting hint.
Here are my affected disks:
[..]
On the other hand, I have 1 DVD of Etch which doesn't have this
problem. I also have a series of 10 home made video disks written in
2004.
Do you happen to see any pattern (maybe in the used filesystems) in
the successful/failing DVDs?
None that fills my sight anyway... as I said, some ISO9660 discs
cannot be verified, while one can be verified. So, whether a disc can
or cannot be verified does not only depend on the filesystem.
Sorry, I sent this too soon.
First, clearly the DVD is not a CD-ROM.
The filesystem used by Civilization V is UDF. Indeed, there is no case
for UDF in cdck.
As for the Debian ISO9660 images, I think I found how the Etch disk
differs from the Lenny and Squeeze disks. Here is what disktype says on
the latter:
# disktype /dev/cdrom
--- /dev/cdrom
Block device, size 4.376 GiB (4698341376 bytes)
CD-ROM, 1 track, CDDB disk ID 02000001
Track 1: Data track, 0 bytes
ISO9660 file system
Volume name "Debian 5.0.0 i386 Bin-1"
Application "GENISOIMAGE ISO 9660/HFS FILESYSTEM CREATOR (C) 1993
E.YOUNGDALE (C) 1997-2006 J.PEARSON/J.SCHILLING (C) 2006-2007 CDRKIT TEAM"
Data size 4.376 GiB (4698322944 bytes, 2294103 blocks of 2 KiB)
El Torito boot record, catalog at 5044
Bootable non-emulated image, starts at 5045, preloads 2 KiB
Platform 0x00 (x86), System Type 0x00 (Empty)
ISOLINUX boot loader
Joliet extension, volume name "Debian 5.0.0 i38"
And here is what it says on etch:
# disktype /dev/cdrom
--- /dev/cdrom
Block device, size 4.376 GiB (4698439680 bytes)
CD-ROM, 1 track, CDDB disk ID 02083401
Track 1: Data track, 307.8 MiB (322701312 bytes)
ISO9660 file system
Volume name "Debian 4.0 r0 i386 Bin-1"
Application "MKISOFS ISO 9660/HFS FILESYSTEM BUILDER & CDRECORD
CD-R/DVD CREATOR (C) 1993 E.YOUNGDALE (C) 1997 J.PEARSON/J.SCHILLING"
Data size 4.376 GiB (4698417152 bytes, 2294149 blocks of 2 KiB)
El Torito boot record, catalog at 5872
Bootable non-emulated image, starts at 5873, preloads 2 KiB
Platform 0x00 (x86), System Type 0x00 (Empty)
ISOLINUX boot loader
Joliet extension, volume name "Debian 4.0 r0 i3"
I do not understand why the etch disc has a track only 308 MB in size.
But certainly, if that matters for cdck, then the 0 bytes track of more
recent discs will prevent verification.
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