/dev/cdrom automagically stopped working

Message

Crashed_Again · Post by **Crashed_Again** » Wed Feb 11, 2004 8:23 am

Well, after I ran an update on a few things and changed my configuration files I came to find upon reboot that /dev/cdrom was a dead link. Its been working for about 3 months now with this kernel. Apparently etc-update messed up one of the config files.

dmesg shows that my cdrom drive is detected as /dev/hdc yet there is no /dev/hdc to be found. Apparently /dev/cdrom is a link to /dev/cdroms/cdrom which has dissapeared. I'm completly lost here.

isoaga · Post by **isoaga** » Wed Feb 11, 2004 9:14 am

Hi, if the output of dmesg says your drive is detected as /dev/hdc i would think that it should exist in the /dev directory, you say it don't? What does the output of this show?

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ls -al /dev/ | grep hd

Also, etc-update will quite happily overwrite your /etc/fstab file if your not careful, so you may want to check in there too

Crashed_Again · Post by **Crashed_Again** » Wed Feb 11, 2004 9:22 am

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#ls -al /dev/ | grep hd 
lr-xr-xr-x    1 root     root           32 Feb 11 03:27 hda -> ide/host0/bus0/target0/lun0/disc
lr-xr-xr-x    1 root     root           33 Feb 11 03:27 hda1 -> ide/host0/bus0/target0/lun0/part1
lr-xr-xr-x    1 root     root           33 Feb 11 03:27 hda2 -> ide/host0/bus0/target0/lun0/part2
lr-xr-xr-x    1 root     root           33 Feb 11 03:27 hda3 -> ide/host0/bus0/target0/lun0/part3
lr-xr-xr-x    1 root     root           32 Feb 11 03:27 hdb -> ide/host0/bus0/target1/lun0/disc
lr-xr-xr-x    1 root     root           33 Feb 11 03:27 hdb1 -> ide/host0/bus0/target1/lun0/part1
lr-xr-xr-x    1 root     root           33 Feb 11 03:27 hdb2 -> ide/host0/bus0/target1/lun0/part2

Actually etc-update did happily replace /etc/fstab. I had to fix it. Even if /etc/fstab was setup incorrectly I should still be getting /dev/cdrom right?

isoaga · Post by **isoaga** » Wed Feb 11, 2004 9:31 am

could you post the sections of the dmesg output relating to the cd drive detection...

EDIT: are you using any scsi emulation, if so have you set any options in your kernel boot parameters (/dev/hdX=ide-scsi)? This may make the device show up as /dev/sr0 or something of that sort.

Crashed_Again · Post by **Crashed_Again** » Wed Feb 11, 2004 9:40 am

Yes I'm passing:

hdc=ide-scsi

as a kernel boot parameter. Their is no /dev/sr0 either.

isoaga · Post by **isoaga** » Wed Feb 11, 2004 9:45 am

ok, it would be great to see the dmesg output...

Crashed_Again · Post by **Crashed_Again** » Wed Feb 11, 2004 10:30 am

Sorry forgot about that. This is all it mentions about the cdrom drive:

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hdc: GENERIC DVD DUAL 4XMax, ATAPI CD/DVD-ROM drive
ide1 at 0x170-0x177,0x376 on irq 15

Crashed_Again · Post by **Crashed_Again** » Thu Feb 12, 2004 1:09 am

If dmesg shows it as /dev/hdc shouldn't their actually be a /dev/hdc? I'm really confused. Perhaps I need a module loaded or something?

isoaga · Post by **isoaga** » Thu Feb 12, 2004 10:59 am

have you changed kernels? also is it a burner? if so you could always move to the 2.6 kernel and do away with the scsi emulation. Other than that i don't know what the problem is, sorry.

Crashed_Again · Post by **Crashed_Again** » Thu Feb 12, 2004 10:03 pm

I've been running the 2.6 kernel with the Andrew Mortenson patch set for a few months now(mm-sources). Everything has worked fine. It has to do with changing one of the .conf files after running etc-update. Which file is the question.

I remember one of the conf files changed was in /etc/modules.autoload.d but I don't think I had any modules listed to load automatically at boot anyway.

This has really crippled my system. I don't know what the problem is.

<EDIT>
I just remembered that etc-update also changed my /etc/group file. Anything in there that would make /dev/cdrom become a dead link?
</EDIT>

Crashed_Again · Post by **Crashed_Again** » Fri Feb 13, 2004 11:12 am

Okay I may be on to something here. From other posts I've read it seems that /etc/devfsd.conf may have something to do with the problem. What is devfs? Maybe my conf file got messed up when I used etc-update.

equilibrium · Post by **equilibrium** » Sat May 15, 2004 1:17 pm

I seem to have the same problem

etc-update also messed up my /etc/fstab and I restored it from backup.

I thought everything was ok until I tried using my cdrom

there is no /dev/cdroms dir and it has dissapeared?

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# ls -al /dev/ | grep hd
lr-xr-xr-x    1 root     root           32 May 15 14:11 hda -> ide/host0/bus0/target0/lun0/disc
lr-xr-xr-x    1 root     root           33 May 15 14:11 hda1 -> ide/host0/bus0/target0/lun0/part1
lr-xr-xr-x    1 root     root           32 May 15 14:11 hdb -> ide/host0/bus0/target1/lun0/disc
lr-xr-xr-x    1 root     root           33 May 15 14:11 hdb1 -> ide/host0/bus0/target1/lun0/part1
lr-xr-xr-x    1 root     root           33 May 15 14:11 hdb2 -> ide/host0/bus0/target1/lun0/part2
lr-xr-xr-x    1 root     root           33 May 15 14:11 hdb3 -> ide/host0/bus0/target1/lun0/part3
lr-xr-xr-x    1 root     root           33 May 15 14:11 hdb4 -> ide/host0/bus0/target1/lun0/part4

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# dmesg | grep hd
    ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:pio, hdb:pio
    ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:pio, hdd:pio
hda: WDC WD800BB-00CAA1, ATA DISK drive
hdb: WDC WD800JB-00FSA0, ATA DISK drive
hdc: PIONEER DVD-RW DVR-106D, ATAPI CD/DVD-ROM drive
hdd: GENERIC FREECOM32A, ATAPI CD/DVD-ROM drive

equilibrium · Post by **equilibrium** » Sat May 15, 2004 1:36 pm

I've fixed my problem

was so easy and pretty much obvious

.

All I did was add ide-scsi to modules.autoload again as etc-update seemed to mess that file up also

I had already added nvidia but totally forgot about ide-scsi.
I also notices /etc/modules.autoload linked to the 2.4 kernel script so I remade it to link to 2.6

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rm /etc/modules.autoload
ln -s /etc/modules.autoload.d/kernel-2.6 /etc/modules.autoload

nano -w /etc/modules.autoload
add "ide-scsi"

lol