CD Burner not functioning correctly after upgrade

jonlake · 11-16-2006, 09:21 AM

I upgraded from Slackware 10.2 to Slackware 11.0. When I boot, my cd burner doesn't work correctly.

Code:

root@evilpenguin:/var/log/apache# cdrecord -scanbus
Cdrecord-Clone 2.01 (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jörg Schilling
cdrecord: No such file or directory. Cannot open '/dev/pg*'. Cannot open SCSI driver.
cdrecord: For possible targets try 'cdrecord -scanbus'.
cdrecord: For possible transport specifiers try 'cdrecord dev=help'.

Why it is trying to use /dev/pg* (from what I have read, that is associated with parallel ports) instead of /dev/sg* or /dev/sr* (It uses one of these when I pass the kernel parameters, I can't remember which one).

However, if I pass the options

Code:

 hdc=ide-scsi

to the kernel at boot, the cd burner will work, however, after burning a cd, it cannot mount the cd (or any cd).

Here is the cdrecord with the parameters passed (it will burn, but not mount a cd)

Code:

root@evilpenguin:/home/jon# cdrecord -scanbus
Cdrecord-Clone 2.01 (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jörg Schilling
Linux sg driver version: 3.1.25
Using libscg version 'schily-0.8'.
scsibus0:
        0,0,0     0) 'HP      ' 'CD-Writer+ 9500 ' '1.0e' Removable CD-ROM
        0,1,0     1) *
        0,2,0     2) *
        0,3,0     3) *
        0,4,0     4) *
        0,5,0     5) *
        0,6,0     6) *
        0,7,0     7) *

and the error message when attempting to mount a cd

Code:

root@evilpenguin:/home/jon# mount /dev/cdrom
mount: wrong fs type, bad option, bad superblock on /dev/cdrom,
       missing codepage or other error
       (could this be the IDE device where you in fact use
       ide-scsi so that sr0 or sda or so is needed?)
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

Here is dmesg

Code:

root@evilpenguin:/home/jon# dmesg | tail
pg: pg version 1.02, major 97
pg0: Autoprobe failed
pg: No ATAPI device detected
paride: version 1.06 installed (parport)
pg: pg version 1.02, major 97
pg0: Autoprobe failed
pg: No ATAPI device detected
ide-scsi: hdc: unsupported command in request queue (0)
end_request: I/O error, dev 16:00 (hdc), sector 64
isofs_read_super: bread failed, dev=16:00, iso_blknum=16, block=32

Also, I try to load the sg or sr module (which are both located in /usr/src/linux-2.4.33.3/drivers/scsi) it says module not found.

The ide-scsi module is loaded and running when it works, and when it doesn't work. I can't seem to figure out what I need to do to get the burner to work and be able to mount cd's.
(This was working previous to upgrade)

J.W. · 11-16-2006, 05:27 PM

The "hdc=ide-scsi" is needed with kernel 2.4.x, but is no longer needed with 2.6.x I'll assume you went with the Slack v11 default, which is 2.4.x, and therefore you should consider just adding that line to your lilo.conf file. (Be sure to rerun /sbin/lilo after you make your changes)

That said, and before digging into this issue, what kind of CD's are you trying to mount? If it's audio CD's, you won't be able to mount them because they lack a valid file system. You'll only be able to mount a data CD, and along these lines after you burn a CD, I have found that you sometimes have to unmount it, physically eject it from the drive, and then re-insert it and remount it. Not sure why that is but sometimes I've burned a CD, unmounted and remounted it, and didn't get results. If I eject it though, it works. Anyway, are you working with data CD's?

jonlake · 11-17-2006, 10:29 AM

I am mounting a data cd that I burned. I am able to mount it right now in /dev/hdc without having passed the parameters hdc=ide-scsi. However, I cannot burn any cd's right nos. It gives me the output when running cdrecord -scanbus.

If I pass the parameters, I will not be able to mount the cd, it gives the output listed above when I attempt to mount it. However, I get positive results from cdrecord -scanbus and am able to burn cd's.

Yes, I am on the default kernel 2.4.33.3