On Oct 13, 2004, at 1:29 PM, Matthew Seaman wrote:

On Wed, Oct 13, 2004 at 11:22:12AM -0700, Laszlo Antal wrote:

When I mount the cdrom with #mount -t cd9660 /dev/acd0c /cdrom

Verb. Sap. Make that:

    # mount -t cd9660 -o ro /dev/acd0c /cdrom

For best results, set up all of the options etc. in /etc/fstab, and
then just use:

    # mount /cdrom

everything works fine.I can get to my ports and everything
But when I want to swap cds and I type #umount /cdrom
I get this error message:: Unable to umount /cdrom, Device is busy.
If I do the umont from KDE I get the same error message.
What I'm doing wrong??

You've either got a process with it's current working directory somewhere under /cdrom, or you've got a process with an open file descriptor (or a memory map) on one of the files on the CD.

Try using:

    # fstat -f /cdrom

to see if you can identify the culprits.  Then either close them down,
or CD to elsewhere in the filesystem if it's an interactive session.
Once the CD Rom is idle, you should be able to dismount it easily.

To elaborate on what Matthew was saying, if you cd /cdrom once it's mounted, and you try to unmount, you're going to get an error. I always make certain to cd back home and the unmount the CD. You can't unmount a device that you're currently 'on.'

Eric F Crist
Secure Computing Networks

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