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issue with unmount /hypercd on AIX 4.3.3.0

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Operating Systems AIX issue with unmount /hypercd on AIX 4.3.3.0
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Old 03-08-2005
Question issue with unmount /hypercd on AIX 4.3.3.0
I want to unmount /hypercd without rebooting system. Using "umount", it says "umount: 0506-349 Cannot unmount /dev/cd1: The requested resource is busy".

I've tried umount ("/hypercd" and "/dev/cd1" and "/dev/cd1 /hypercd" as well as using the "-f" flag with those derivations but get the same error message.

I've also tried "fuser /hypercd" (alone and with the "-k" and "-u" flags), as well as "fuser /dev/cd1" to no avail. The "fuser" command never returns anything except "/hypercd:".

The user already tried to reboot and that didn't work, but that is most likely because of entries in /etc/filesystems (which had "mount=true"). I thought that part of my issue might have been because /hyperlib had a soft link from bin to /hypercd/bin, thinking that is what might be hanging me up, I removed it and tried the above items again (obviously still a no go).

So, now I have tried what I know, searched here in the forums and commented out the appropriate entries in /etc/filesystems, my only other option that I know of is to reboot the system so that the modified /etc/filesystems will yield the result I want. I would rather not reboot.

Does anyone have any other ideas?

TIA
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LEARN ABOUT POSIX

umount.nfs

UMOUNT.NFS(8)						      System Manager's Manual						     UMOUNT.NFS(8)

NAME

       umount.nfs, umount.nfs4 - unmount a Network File System

SYNOPSIS

       umount.nfs dir [-fvnrlh ]

DESCRIPTION

       umount.nfs and umount.nfs4 are a part of nfs(5) utilities package, which provides NFS client functionality.

       umount.nfs4  and  umount.nfs are meant to be used by the umount(8) command for unmounting NFS shares. This subcommand, however, can also be
       used as a standalone command with limited functionality.

       dir is the directory on which the file system is mounted.

OPTIONS

       -f     Force unmount the file system in case of unreachable NFS system.

       -v     Be verbose.

       -n     Do not update /etc/mtab.	By default, an entry is created in /etc/mtab for every mounted file system. Use this option to skip delet-
	      ing an entry.

       -r     In case unmounting fails, try to mount read-only.

       -l     Lazy unmount. Detach the file system from the file system hierarchy now, and cleanup all references to the file system as soon as it
	      is not busy anymore.

       -h     Print help message.

NOTE

       For further information please refer nfs(5) and umount(8) manual pages.

FILES

       /etc/fstab	 file system table

       /etc/mtab	 table of mounted file systems

SEE ALSO

       nfs(5), umount(8),

AUTHOR

       Amit Gud <agud@redhat.com>

								    6 Jun 2006							     UMOUNT.NFS(8)