topic Re: Unable to umount the /dvdrom in Operating System - HP-UX

Unable to umount the /dvdrom

Delecole — Thu, 06 Jul 2006 05:05:29 GMT

Hi there !

i'm installing an application on a L1000 machine with a DVD.
I have mounted the dvd with :
/etc/mount -F cdfs -o rr /dev/dsk/dvdrom /dvdrom

... installed the application, which did reboot the machine.

Once the application is installed, I try to umount the drive, but getting the following error :

# /etc/umount /dvdrom
umount: cannot unmount /dvdrom : Device busy
umount: return error 1.

- I think the problem is only appearing when the machine reboots with a CD inside of the Drive.
- I can't fins any process using the /dvdrom anymore ...

the only solution (That I want to avoid, is to reboot the server.

Anybody has an idea ?
Many Thanks !

Re: Unable to umount the /dvdrom

Peter Godron — Thu, 06 Jul 2006 05:08:30 GMT

Hi,
have you tried:
cd /
fuser -cuk /dvdrom

This will kill any process using the device.

Otherwise you can normally force eject the media, by inserting a paperclip into the small eject hole.

Re: Unable to umount the /dvdrom

Arunvijai_4 — Thu, 06 Jul 2006 05:10:13 GMT

Hi,

Try with # fuser -ku /dvdrom.

It should kill all the processes using /dvdrom

-Arun

Re: Unable to umount the /dvdrom

Delecole — Thu, 06 Jul 2006 05:10:59 GMT

thanks guys !!
I'll try this and let you know !

Re: Unable to umount the /dvdrom

Delecole — Thu, 06 Jul 2006 05:12:04 GMT

PC ... instead of killing ... before killing, is it possible to see the process that uses /dvdrom ?

Re: Unable to umount the /dvdrom

Pete Randall — Thu, 06 Jul 2006 05:15:23 GMT

Sure, just don't use the "-k" switch.

Pete

Re: Unable to umount the /dvdrom

Torsten. — Thu, 06 Jul 2006 05:15:45 GMT

fuser without "-k" or lsof

Re: Unable to umount the /dvdrom

RAC_1 — Thu, 06 Jul 2006 05:47:05 GMT

fsuer may not report it, but lsof will.
lsof /dev/dvdrom

Re: Unable to umount the /dvdrom

Bill Hassell — Thu, 06 Jul 2006 12:48:36 GMT

Note that there is no /etc/umount command. It is actually a temporary transition link which is provided so administrators can fix all their old code and habits. Use the command:

ll -d /etc/mount

to see the link. The command is /usr/bin/umount or /sbin/umount.

Note also that is any process (perhaps a login shell) does a cd /dvdrom, the device will remain busy forever. It is always recommended not to cd into removable media directories for this reason. Most likely, someone has cd'ed into the /dvdrom directory.

Re: Unable to umount the /dvdrom

Delecole — Fri, 07 Jul 2006 02:17:32 GMT

Perhaps, yes ... but even if I "cd" back to /, the device stays busy then ?

Re: Unable to umount the /dvdrom

Bill Hassell — Fri, 07 Jul 2006 06:01:01 GMT

If any user cd's to /dvdrom, then the mountpoint will be busy. Do you have /dvdrom listed in /etc/fstab? If so, add the option noauto to the cdfs flags, something like:

/dev/dsk/c0t2d0 /dvdrom cdfs ro,noauto 0 0

Now the CD won't be automatically mounted but can be mounted and umounted as needed. The only way you will find the culprit is to download lsof. It will find the process that is keeping this mountpoint open.

Re: Unable to umount the /dvdrom

Chan 007 — Fri, 07 Jul 2006 06:25:22 GMT

Hi

If you installed it and you have not come out of the session, just logout this may kill your open process and you can get rid of this problem.

Chan