6027-1996 Command was unable to determine whether file system fileSystem is mounted.
Explanation
The command was unable to determine whether the cited
file system is mounted.
User response
Examine any prior error messages to determine why
the command could not determine whether the file system was mounted,
resolve the problem if possible, and then reissue the command. If
you cannot resolve the problem, reissue the command with the daemon
down on all nodes of the cluster. This will ensure that the file system
is not mounted, which may allow the command to proceed.