I thought this had been fixed with newer kernels?
We have an old Maxtor Snap Server, an 80 GB NAS unit, containing some of our 
archives.
Both of our CentOS servers have it permanently mounted by NFS for convenient 
access.
This weekend, I discovered remotely that, although all systems except the 
VRTSralus remote agents for Veritas (now Symantec) Backup Exec were working 
just fine, both servers would freeze a shell solid on starting to run "lsof" or 
half way through a "df". However, "mount" ran OK and showed the next item in 
the "df" should have been the Snap Server NFS mount. I pinged it and it did not 
respond - I'll let you know Monday what is up. "umount -f"  showed "Device 
busy" but "umount -l" worked just fine and "df" "lsof" and "VRTSralus" all work 
OK now. BTW the Veritas does not access the Snap Server, though the weekly 
cron-job to tar-ball the Snap Server at 02:00 Saturday did not email me at all, 
though it is shown in /var/log/cron.

Does anyone know of a method to make NFS mounts auto un-mount if the remote 
server disappears?


Mike Yates    MBCS CITP (ISSG)
IT Support Engineer

Hawkgrove Ltd  -  Software Systems Design
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5DL, UK
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