topic force unmount in Operating System - HP-UX

force unmount

manu_9 — Thu, 27 May 2004 03:54:55 GMT

Can you forcibly unmount a fs in HP-UC 11i or 11.23.like umount -f on solaris and aix.

Re: force unmount

Mark Grant — Thu, 27 May 2004 03:58:46 GMT

No, there isn't a force option on hpux.

Re: force unmount

Rajesh D L — Thu, 27 May 2004 04:02:19 GMT

Hi Manu,

U can try fuser -ck /fs;umount /fs
for unmounting forcefully.

regards,
RDL.

Re: force unmount

Naveej.K.A — Thu, 27 May 2004 04:02:57 GMT

hi manu,

I don't think we can forcibly unmount a filesystem.

man fuser for entry -k says send sigkill signal to each process using each file..

but fuser -k filesystem
and then umount filesystem was still not working...

with best wishes
Naveej

Re: force unmount

Robert-Jan Goossens — Thu, 27 May 2004 04:03:45 GMT

Hi,

If I'm not mistaken only sol 8 + 9 have the umount -f option, HPUX does not have this option yet (maybe in the future :-) ).

Regards,
Robert-Jan

Re: force unmount

Mark Grant — Thu, 27 May 2004 04:07:22 GMT

Just to remind everybody, Linux also has the force option :)

Re: force unmount

KapilRaj — Thu, 27 May 2004 06:24:29 GMT

Manu,

If ur scenarion is as follows ,

Somebody switched-off NFS server and umount commands are hanginng...

I have a work awround ...

Bringup NFS Server's IP address on the local node as an alias and try umount !

Kaps

Re: force unmount

SAHA — Thu, 27 May 2004 07:47:57 GMT

No force umount in HPUX till now.

Thanks,

Re: force unmount

Alzhy — Thu, 27 May 2004 07:54:35 GMT

Yes there is a force umount - if you've installed VxFS 3.5. I have not tried it though on NFS mounts...

Re: force unmount

iminus — Thu, 27 May 2004 18:26:33 GMT

You can't force unmount. What you can do is to issue a fuser command on the filesystem to see if any user is using it. And do a ps -ef|grep to see if any other processes are running, also, check if the mount point contains another mount point in it's path. If you are trying to umount some system mount points like /etc or /usr, you need to do it in single user mode

Re: force unmount

manu_9 — Fri, 28 May 2004 02:13:36 GMT

Thanks , I guess HP shud provide that option to help Admins do a better job.

Re: force unmount

Brian Hackley — Mon, 31 May 2004 12:48:51 GMT

Hello Manu,

HP knows about this issue. We have a White Paper that discusses the issue, and yes it does cover some of the workarounds that were suggest in replies to your postings. The URL is http://docs.hp.com/hpux/onlinedocs/3929/ForciblyUnmountingNFSFilesystems.pdf

Also, please assign points to the replies given to you in the forums based on their usefulness to your issue. Thank you in advance.

Hope that helps,
-> Brian Hackley