Just spent some time configuring things in a slack-9.1 install and I am getting this message in my /var/log/system log

Oct 4 13:51:09 rick kernel: sr0: CDROM (ioctl) reports ILLEGAL REQUEST.

Yesterday I was logged in as a user while playing some music and kscd seemed to keep dropping out . This is what prompted me to check the syslog. But since I had settings screwed up on kscd and had two instances fighting over one cd drive I thought that was the problem

I also noted that a couple times my cd just raced off and then stopped. I've never had any problems with the cd unit which is a LG 40X12X40X. I use them for backups at work and they never give a problem.

Leads me to think it may be my configuration. My /etc/fstab entry for cdrom is provided below. This has been changed from the default found in fstab after install and seemed to work well enough in 9.0 and 8.1 but perhaps theres something different about this version/kernel which doesn't appreciate fstab reading like this

/dev/scd0 /mnt/cdrom iso9660 noauto,owner,users 0 0

Just noticed I've had a fairly stable run on kscd while writing this. Earlier this AM it was cutting out every two minutes or so while I was opening some things up and starting kppp and reading mail. Maybe there's a conflict when some other module is loaded. I have disabled hotplug cause it stumbles on my soundcard at boot. Last night played a couple cd's while compiling without any breaking off. Was able to pull some source off cd's to without any problems.

TIA

Rick

It seems you have enabled scsi emulation support or you have an actual scsi drive.
the /etc/fstab line you reported has a couple of mistakes

/dev/scd0 /mnt/cdrom iso9660 noauto,owner,users 0 0

you cannot use both owner (usually root) and user at the same time.
Anyway users is wrong. Type user instead.
Ciao

In /etc/group there is a group called users... I think that is what the "users" there is. Thus it would not be a spelling error.

I have an ide drive and use append="hdb=ide-scsi" in lilo.conf, hence I mount /dev/scd0 when burning. For cdrom drive my /etc/fstab looks like this:

/dev/scd0 /mnt/cdrw auto noauto,owner,users 0 0
/dev/cdrom /mnt/cdrom iso9660 noauto,owner,users,ro 0 0

A mistake has crept in and I'm using "users" instead of "user". Since you mentioned it, I now recall one time when i was editing an fstab, I put in "users", and then stopped to wonder if I was right. But I never checked and all seemed to be OK, at least for what I do. I have two boxes at home, one at work and another at a friends house set up like this and alseem to be working OK.

This idea of two mount points came from a webpage called Slackware Tips & Tricks by Jack S Lai. After install, I rm /dev/cdrom then after editing fstab and lilo.conf as is above, I then run lilo and reboot I also have to ln -s /dev/scd0 /dev/cdrom, and mkdir /mnt/cdrw.

Never had a bit of trouble albeit I use /dev/scd0 when burning with cdrecord and /dev/cdrom when running kscd. The KDE icon for mounting the cd drive is set up for /dev/scd0 but works with /dev/cdrom. The only time I mount them as a file system is with the command mount /mnt/cdrw or /mnt/cdrom and both of those work too.

I suppose I could change it to "user" though. It's probably better to have the box doing what I tell it to do and not what I want it do do :^)

Cheers

Rick