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Do not attempt to mount directly the device ! You need to mount a partition of it. For example, this is wrong when you do: mount /dev/sda /mnt What you should do is: mount /dev/sda3 /mnt The system need the meta-data enclosed in the partition to know what to do with it. If you mount directly the device, these meta-data are missing and the mount will ...


The order of reboots is important. Rebooting the server after the clients can result in this situation. The stale NFS handle indicates that the client has a file open, but the server no longer recognizes the file handle. In some cases, NFS will cleanuo its data structures after a timeout. In other cases, you will need to clean the NFS data structures ...


When using mount you have to mount the partition not the drive itself eg mount -t ext4 /dev/sda1 /data


In relation to the troubleshooting process, when trying lsof or fuser, don't only check against the relevant partition - check against the disk directly. This quickly would have directed you to the correct solution: Bad: fuser /dev/cciss/c0d0p1 Good: fuser /dev/cciss/c0d0 Bad: lsof /dev/c0d0p1 Good: lsof /dev/ | grep c0d0


You should check the cron files for whatever is inside /etc/cron* and if any "sudoed" users got a cron inside /var/spool/cron/crontabs/ that could umount something. autofs can also do stupide stuff with mount binds, but I've never seen it happen.

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