Hi, I have strange problems unmounting my nfs4 directories since SL6.x (6.0, 6.1 and 6.2; actually 64Bit SL6.2 on client and server).
If I try to umount such a nfs4 directory, then I get errors of the type: #umount /9 /9 was not found in /proc/mounts /9 was not found in /proc/mounts and the directory is still fully functional and mounted. I tried to ignore this error but I have 19 nfs file-servers in the cluster running with SL6.2, which I can not reboot properly due to this problem. And the file-systems really don't like the hard power cycles. I have no clue why this error occurs. Everything looks fine for a nice umount: #cat /etc/fstab [...] 10.10.70.9://raid_0 /9 nfs [...] #mount 10.10.70.9://raid_0 on /9 type nfs (rw,vers=4,addr=10.10.70.9,clientaddr=10.10.70.43) #cat /proc/mounts [...] 10.10.70.9:/raid_0/ /9 nfs4 rw,relatime,vers=4,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,por t=0,timeo=600,retrans=2,sec=sys,clientaddr=10.10.70.43,minorversion=0,local_ lock=none,addr=10.10.70.9 0 0 [...] #cat /etc/exports (nfs server) /raid_0 10.10.60.0/255.255.255.0(rw) 10.10.70.0/255.255.255.0(rw,no_root_squash) 10.10.10.0/255.255.255.0(rw,no_root_squash) 10.10.0.0/255.255.255.0(rw,no_root_squash) 192.168.1.0/255.255.255.0(rw,no_root_squash) If I mount a nfs3 directory on the SL6.2 client, which is listed in /proc/mounts like this: 10.10.0.2://glocal /glocal nfs rw,relatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,tim eo=600,retrans=2,sec=sys,mountaddr=10.10.0.2,mountvers=3,mountport=39938,mou ntproto=udp,local_lock=none,addr=10.10.0.2 0 0 then I can mount/unmount it as often as I want or until the keyboard breaks. It would be brilliant if someone has an idea why this happens with NFS4. Thanks! best wishes David
