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sony cdu31a setup

Posted on 1997-11-15
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Last Modified: 2013-12-15
I have just installed redhat4.2.  When I try to mount my cdrom, a sony cdu31a, I get the following error message:
mount: the kernel does not recognize /dev/cdu31a as a block device  (maybe a 'ismod driver')

Any sugestions?
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Question by:gburton
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Belar earned 150 total points
ID: 1630623
What is happening is that when you try to mount /dev/cdu31a there is no driver present in memory or there is a problem with the device file.

First check if the kernel support the cdu31a.

riverdale:/dev# cat /proc/devices
Character devices:
 1 mem
 2 pty
 3 ttyp
 4 ttyS
 5 cua
 7 vcs

Block devices:
 3 ide0
 15 cdu31a

If it is not there, we have a problem. We need to make sure we have the config enabled in the kernel but we might be lucky and it might be already enabled and you just have to type :

$ insmod cdu31a

If this doesn't work we'll have to compile a new kernel with the support for CDU31A in it. (I can help you with that too)

If it is, we now check to see if the device files is correct.
from my list , it is /dev/sonycd not /dev/cdu31a . Cdu31a is the name of the driver but if you have /dev/cdu31a just make sure it look like this one even if the name is different.

riverdale:/dev# ls -l /dev/sonycd
brw-r-----   1 root     disk      15,   0 Jul 17 1994 /dev/sonycd

The important thing is the 15. This tell the system what driver to use. In our case the cdu31a.

Try the mount and tell me the result.

Also, you might like to type dmesg to see if the kernel reconized your cdu31a.
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by:gburton
ID: 1630624
I will try your suggestions,  thanks for your timley response.
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