weird NFS mounting issue.

Recently this Sun server is getting weird with NFS mounting.

It (A) couldn't mount one server (B), but A can mount another server (C). And server D can mount well on server B.

A just can't mount a certain server B, no matter what I did. It was running fine, and all the sudden, it stop working.

A can mount C, D, but can't mount B

D can mount C, B fine.

and if I do manually mount, it just stuck there, and I have to do Ctrl+c to stop and I got"bad directory"

I can create another share on server D, and A can mount it, but just can't mount B.

/var/adm/messages, didn't say much, just saying "NFS server XXX not responding"..

Any idea?

[695 byte] By [tingca] at [2007-11-26 22:18:11]