Hi everybody!

I have a slight problem ... every time i try to read data cd'd ... my system hangs after few seconds (keyboard lights blinking). I think that this problem started after i added new hard drive and had to set my cd-writer (problem device i speak about) as slave on second ide cable. The funny thing about that is that i can hear audio cd's and even burn cd's (i'm using K3b as cd-burning software). Any ideas what i do wrong?

some lilo.conf lines:

image=/boot/vmlinuz
label="linux"
root=/dev/hda1
initrd=/boot/initrd.img
append="quiet devfs=mount hdd=ide-scsi acpi=off"
vga=788
read-only

fstab line for cd-rom:

none /mnt/cdrom supermount dev=/dev/scd0,fs=auto,ro,--,iocharset=iso8859-15,codepage=850,umask=0 0 0

I have a suspession that
/dev/scsi/host0/bus0/target0/lun0/cd
is incorrect, as my cd-writer is slave on second ide cable. I'm not quite familiar with these new device markings but even if i use "/dev/scsi/host0/bus0/target0/lun0/cd" in fstab instead of "/dev/scd0" it won't work - i tried

Any suggestions? I'm out of ideas

My system:
Mandrake 9.1 (with latest updates)
CD-Writer: LG 48x24x48x

what does
cdrecord -scanbus
report?

Cdrecord 2.0 (i586-mandrake-linux-gnu) Copyright (C) 1995-2002 Jörg Schilling
Linux sg driver version: 3.1.24
Using libscg version 'schily-0.7'
scsibus0:
0,0,0 0) 'HL-DT-ST' 'CD-RW GCE-8481B ' '1.00' 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) *

you can try enabling dma for your cd-writer.
as root: hdparm -d1 /dev/scd0

good luck.

i get

"/dev/scd0 not supported by hdparm"

I get the same thing if I try to read the 2nd install CD. Best I can guess the CD driver is not so hot at reading a lot of little files like the RPM list CD 2 has on it. I am currently using XP to copy the RPM's to the HD so I can copy them to a folder on my linux paritition and not have to worry about the CD's though it would be nice to figure out exactly what the problem is.

Once it locks up I can do nothing, and it reads other CD's just fine. There is no problem with the media either as XP has no problem with the data at all. Best i can guess the sytem is either not good at reading lots of small bits of DATA {I'll admit it took XP 20+ minutes to copy the CD which is ridiculous} or its corrupting its buffers and then its over for it. Annoying part is you can't do anything but hard reboot. Even if you don't get to the full blinking keyboard lock stage it refuses to let go of the CD once this occurs, Manually forcing the drive to open does nothing for linux, it still incists it has a CD in the drive and that the CD drive is actively reading from it. If you try to shut down it will get to unloading alsa and then stay there for ever.

but i don't understand ... before i added a hard drive everything was fine ... i could browse every cd i wanted. something is still wrong with my hardware configuration. i hope that somebody would give me a hint ... i'm out of ideas and only thing i can think about that would help, is to re-install Linux ... but that would be kind of escaping :P ... i won't give up