Why isn't it possible to unmount a NFS share if the IP-address of the NFS-Server has changed?
Today I had a situation where a client hosting a NFS filesytem which is being mounted on one
of my AIX boxes died. Every ls command in the mount point resulted in either long timeouts or
I/O Errors which drove one of our FAM
-processes crazy. So I had to unmount the filesystem to
ensure the functionality of this process. That was impossible, because the host was not up anymore
and so I couldn't unmount the filesystem. What really helped then was to bring up a secondary
interface with this hosts ip-address (it was down at this time anyway) on my client machine.
After doing so, I was able to unmount the NFS share (just to mention, my client does not understand
a word of NFS) by just bringing up the ip-address again. Where's the damn sense in that?