[Techtalk] Input/Output Error when reading from CD-RW

[TechChiq]

On Fri, 31 Oct 2003 11:01:19 +0100, Rudy L. Zijlstra 
<rudy at edsons.demon.nl> wrote:

> It may be toast. Take a look in /var/log/messages or .../kernel and post 
> the errors you should find there. That will teach us more about the 
> problem. It does not look like you need to install more programs.

Ok, and update, looking at the log, here is what I found for the CD-access 
problem:

Oct 31 11:21:46 localhost kernel: udf: registering filesystem
Oct 31 11:21:49 localhost kernel: UDF-fs: No VRS found
Oct 31 11:22:09 localhost kernel: scsi0: ERROR on channel 0, id 0, lun 0, 
CDB: Read (10) 00 00 00 11 a4 00 00 14 00
Oct 31 11:22:09 localhost kernel: Current sd0b:00: sense key Medium Error
Oct 31 11:22:09 localhost kernel: Additional sense indicates Random 
positioning
error
Oct 31 11:22:09 localhost kernel:  I/O error: dev 0b:00, sector 18064
Oct 31 11:22:59 localhost kernel: scsi0: ERROR on channel 0, id 0, lun 0, 
CDB: Read (10) 00 00 00 00 1a 00 00 18 00
Oct 31 11:22:59 localhost kernel: Current sd0b:00: sense key Medium Error
Oct 31 11:22:59 localhost kernel: Additional sense indicates Unrecovered 
read error
Oct 31 11:22:59 localhost kernel:  I/O error: dev 0b:00, sector 104
Oct 31 11:23:02 localhost kernel: scsi0: ERROR on channel 0, id 0, lun 0, 
CDB: Read (10) 00 00 00 00 32 00 00 32 00
Oct 31 11:23:02 localhost kernel: Current sd0b:00: sense key Medium Error
Oct 31 11:23:02 localhost kernel: Additional sense indicates Unrecovered 
read error
Oct 31 11:23:02 localhost kernel:  I/O error: dev 0b:00, sector 200
Oct 31 11:23:04 localhost kernel: scsi0: ERROR on channel 0, id 0, lun 0, 
CDB: Read (10) 00 00 00 00 1a 00 00 02 00
Oct 31 11:23:04 localhost kernel: Info fld=0x1b, Current sd0b:00: sense 
key Medium Error
Oct 31 11:23:04 localhost kernel: Additional sense indicates Unrecovered 
read error
Oct 31 11:23:04 localhost kernel:  I/O error: dev 0b:00, sector 108

At the beginning it said "UDF-fs: No VRS found". Now I know that's good 
that it's UDF, it's supposed to be. But the "No VRS found" - Virtual R???? 
System? IOW, it burned the files but didn't put it in a recognizable file 
system? Or, did I in not installing some file systems like VFS and other 
stuff, could that affect it? I don't have like VFS or Reiserfs or anything 
but what I need just for linux (ext3, vfat capability).

Maybe I didn't put some packages in that I should have? I'm wondering.

Or it might just be that I didn't burn it right the first time around... 
:(

I'm tempted to wipe everything, reinstall Windows, and see if that will 
read it enough to get the data, then get it onto a normal CD-R and 
reinstall Linux again. I also might try copying this disk to a plain CD-R 
and seeing if I can read it then.

Hamster's idea of a raw read didn't even work though. So I don't know how 
much luck I'm going to have. :/

TechChiq