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Re: Problem on mounting CD...

On Fri, 11 Apr 1997, Felix Almeida wrote:

> Hi!
>   I've been tried to allow the normal users in my system to mount a CD-ROM
> but with no success... I even put the following line in my /etc/fstab:
>     /dev/cdrom /cdrom iso9660 ro,noauto,user,unhide 0 0
>   Where /dev/cdrom is a symbolic link to /dev/scd0. My /cdrom directory
> has the following permitions: 
>     drwxr-xr-x   2 root     root         1024 Apr 11 10:23 /cdrom/
>   The problem is that the users can mount the CD but cannot umount it! The
> "mount /cdrom" works fine but "umount /cdrom" gives the error message: 
>     umount:  /cdrom mount disagrees with the fstab
>   I don't know if this can make diference, but I have CD-ROM support as a
> module in the kernel (sr_mod and isofs).
>   Please, help-me! :~(
> Thanks,
> Felix Almeida.
I've had something very similar.  I have a SoundBlaster CD (old!) which
has a device name /dev/sbpcd.  This is linked to /dev/cdrom.

The problem is that mount and umount cannot always follow links: 

In /etc/fstab and /etc/mtab use this line

/dev/scd0 /cdrom iso9660 ro,noauto,user 0 0
so you have the true device name: it works for me.  Now, if I type mount
/cdrom as a user, there is a short wait as the module loads then I can cd
/cdrom and use any files, then umount /cdrom and the module unloads.  
If no cdrom is mounted /cdrom is just an empty mount point and shows two 
directories. ls -al shows:
        drwxrwsr-x   2 root	cdrom		1024	Sep 14  1995 .
        drwxr-xr-x  19 root	root		1024	Apr  8 16:50 .. 

Hope this helps,


Andrew Martin Adrian Cater (Andy) +44 1242 672705 amacater@galactic.demon.co.uk

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