rpc.mountd: getfh failed: Operation not permitted

I have a strange problem with an NFS client that can not mount file systems from some NFS servers.

e.g.:

mount clark:/disk1 /mnt/tmp
mount: clark:/disk1 failed, reason given by server: Permission denied

The server logs:

Jan 23 12:56:02 clark rpc.mountd: authenticated mount request from
rc0478:623 for /disk1 (/disk1) 
Jan 23 12:56:02 clark rpc.mountd: getfh failed: Operation not permitted 

However, doing:

mount clark:/disk2 /mnt/tmp

works fine - after this mount, /proc/mounts shows:

clark:/disk2 /mnt/tmp nfs rw,v3,rsize=32768,wsize=32768,hard,udp,lock,addr=clark 0 0

On the server, /disk1 and /disk2 are separate disks exported in exactly the same way:

/disk1 *(rw)
/disk2 *(rw)

The server is running a 2.4.19 based kernel with nfs-utils v0.3.3 (RedHat 7.2) (all a bit old, but they work fine)

The same client (running a 2.4.23 based kernel) is having the same problem with a few other servers (but not all). Some of these other servers are running a 2.4.21 based kernel.

However, every other client (100's of them) has no problems mounting these same filesystems.

Any ideas?

Thanks

James Pearson

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