topic Re: Problem to umount cd-rom in Operating System - HP-UX

Problem to umount cd-rom

Remko Oosenbrug — Tue, 22 Aug 2000 10:29:48 GMT

When I try to umount my cd-rom the systems says:

umount: cannot unmount /wocas_cd : Device busy

How can I see what keeps th cd-rom busy?

Re: Problem to umount cd-rom

Victor BERRIDGE — Tue, 22 Aug 2000 10:31:02 GMT

use the cmd fuser

Re: Problem to umount cd-rom

John Palmer — Tue, 22 Aug 2000 10:31:46 GMT

Try 'fuser -c /wocas_cd'

This will give a list of processes that are using the mountpoint. See man fuser.

Re: Problem to umount cd-rom

CHRIS_ANORUO — Tue, 22 Aug 2000 10:34:22 GMT

If you are in the /cdrom directory, it will give you the same error. Do cd and enter to take you to $HOME.

Re: Problem to umount cd-rom

Bill Hassell — Tue, 22 Aug 2000 12:03:09 GMT

There are dozens of ways to keep a CDROMmountpoint open:

- cd to the mountpoint (anyone on the system)
- export the filesystem through NFS
- copying a file
- application has a file open

Of these, only the last two will be accurately reported by fuser. Try fuser pointing to the mountpoint, and then also to the device files. If that still does not show who has the CDROM open, get a copy of lsof (List Open Files) from the Liverpool archives:

http://hpux.connect.org.uk/

At the bottom of that page are links to mirror sites around the world.

Re: Problem to umount cd-rom

Antoanetta Naghiu — Tue, 22 Aug 2000 12:25:23 GMT

As it was already said, fuser will help you to see the processes. Check if yourself or someone else is sitting inthat directory.
You have to be root to umount it.

If the cdrom has been mounted using pfs_mount, you have to
#/usr/sbin/pfs_umount /cdrom (or whatever is the cdrom mount point)
If necessary, stop the pfsd and pfs_mountd processes.

Re: Problem to umount cd-rom

Anthony Goonetilleke — Wed, 23 Aug 2000 22:42:15 GMT

The easiest thing to do is
#fuser -cuk /cdrom

This should kill all proc's associated with that mount point