[CLUE-Tech] ISO images from Audio CD's?

[Randy Arabie]

On Sunday,  8 December 2002 at 19:56:05 -0700, David Anselmi <anselmi at americanisp.net> wrote:
> Randy Arabie wrote:
> [...]
> 
> >For example, I have a regular CDROM drive and a CD-Writer drive.  I 
> >can't put an audio CD in the CDROM and make a copy of it with my 
> >CD-Writer?
> 
> Try it.  I have copied ISO (heck, Joliet even, maybe) CDs like this:
> 
> dd if=/dev/cdrom of=cd.iso

I just tried this with an audio CD and got:

rrarabie at potter:~$ sudo -u root dd if=/dev/cdrom
of=/var/local/audio/music.iso
dd: reading `/dev/cdrom': Input/output error
0+0 records in
0+0 records out
rrarabie at potter:~$ sudo -u root dd if=/dev/hdb
of=/var/local/audio/music.iso
dd: reading `/dev/hdb': Input/output error
0+0 records in
0+0 records out

My /dev/cdrom is a symbolic link to /dev/hdb.  Next I tried with a 
data CD:

rrarabie at potter:~$ sudo -u root dd if=/dev/hdb
of=/var/local/audio/test.iso
211840+0 records in
211840+0 records out

It works. The diff even came back perfect! 

But why won't it work with an audio CD?

Here are some errors I get in syslog when I try the dd of an 
audio CD:

Dec  9 20:04:12 potter kernel: VFS: Disk change detected on device
ide0(3,64)
Dec  9 20:04:12 potter kernel: hdb: command error: status=0x51 {
DriveReady SeekComplete Error }
Dec  9 20:04:12 potter kernel: hdb: command error: error=0x54
Dec  9 20:04:12 potter kernel: end_request: I/O error, dev 03:40 (hdb),
sector 0
Dec  9 20:04:12 potter kernel: hdb: command error: status=0x51 {
DriveReady SeekComplete Error }
Dec  9 20:04:12 potter kernel: hdb: command error: error=0x54
Dec  9 20:04:12 potter kernel: end_request: I/O error, dev 03:40 (hdb),
sector 4

-- 
Allons Rouler!
        
Randy
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