nfs umount: string: is busy

Cause

This message appears when the superuser attempts to unmount an active NFS filesystem. The busy point is the working directory of a process.

Action

Determine which shell (or process) on the workstation is currently located in the remotely mounted filesystem, and change (cd(1)) out of that directory. Be wary of subshells (such as su(1M) shells) that could be in different directories while the parent shells remain in the NFS filesystem.