nfs mount: mount: string: Device busy

Cause

This message appears when the superuser attempts to NFS mount on top of an active directory. The busy device is actually the working directory of a process.

Action

Determine which shell on the workstation is currently located below the mount point, and change that directory. Be wary of subshells (such as su(1M) shells) that could be in different working directories while the parents remain below the mount point.