How to unmount the NFS. Please help.

[apple]

Dear HPUX Gurus,
We have NFS file system currently mounted in server A. The problem is the server B that provides the nfs file system has changed the ip. When I go to server A, it says - NFS server B not responding still trying. how can I disable this NFS file system since we don't need it. Please help. Hope to hear from you.

[Yogeeraj_1]

hi,

can you try to change the IP address of server B in the /etc/hosts?

revert

kind regards
yogeeraj

[Shrikant Lavhate]

hi,

To unmount NFS imported you can use:

umount -h xyz.com -a

This will unmount all mount imported from the host.

[apple]

Dear Gurus,
before I unmount, i wanna double verify the NFS from that server B.
I tried to issue:
# showmount -a
showmount: puyuh: RPC: Program not registered

the command
# umount -h xyz.com -a

if let say the server name is "kedidi"
shall i use like this:
# umount -h kedidi -a

I'm a newbie, I'm very afraid to change something very major like this. Hope to hear from you. Thanks a bundle
promise of a good points

[Shrikant Lavhate]

hi,

hostname you are using into command should be same as mentioned into /etc/mnttab. You can verify this name by running bdf command where it can be seen as xyz.com:/filesys.

[F Verschuren]

If the Ip adress is no longer availeble it is waiting on I/O im my experiens you can only umount it if the i/o wait is gone, this can be done bu rebooting server A
ore temp ad the ip back to server b and umount it.

[Robert-Jan Goossens · Accepted solution]

Hi,

If you are running 11.i v2 or v3 aka 11.23 and 11.31, you can use the umount -f to force the nfs unmount otherwise you will have to reboot.

Regards,
Robert-Jan

[Yogeeraj_1]

hi again,

did you try to modify the /etc/hosts or DNS entry so that the server resolves to the new address?

(may also have to modify your /etc/exports)

this can work.

revert
kind regards
yogeeraj

[V. Nyga]

Hi,

the problem is to umount a not-responding file-system!
With the right os (as said above) you can use the force-option, else you have to reconnect to the nfs-server first or do a reboot.
If it's only the ip-address, then you have to change this address for server B in the /etc/hosts of server A.
Then the reconnect should work.
To unmount a directory check your /etc/fstab, there, for example, is:
'server:/bitmaps /bitmaps nfs'
Then your command is 'umount /bitmaps'.
Else, before reboot(!), you should change the /etc/fstab and comment out all directories with are mounted from server B.

HTH
Volkmar

[apple]

Dear HP UX Gurus,
Thanks a lot for your close guidance. I was able to NFS server B not responding.
I commented the respective entry in the /etc/fstab and /etc/mnntab from the NFS client. When I issue bdf in the NFS client, the NFS server B not responding was disappear. Thanks a lot. :)