NFS Services Administrator's Guide

Troubleshooting NFS Services
Common Problems with NFS
Chapter 5 173
“Device Busy” Message
❏ If you received the “device busy” message while attempting to
mount a directory, check whether it is already mounted.
❏ If you received the “device busy” message while attempting to
unmount a directory, a user or process is currently using the
directory. Wait until the process completes, or follow these steps:
1. Enter the following command to determine who is using the
mounted directory:
/usr/sbin/fuser -cu local_mount_point
The fuser(1M) command will return a list of process IDs and
user names that are currently using the directory mounted
under
local_mount_point . This will help you decide whether to
kill the processes or wait for them to complete.
2. To kill all processes using the mounted directory, enter the
following command:
/usr/sbin/fuser -ck local_mount_point
3. Try again to unmount the directory.
❏ Verify that the filesystem you are trying to unmount is not a
mount-point of another filesystem.
❏ Verify that the filesystem is not exported. In HP-UX 11i v3, an
exported filesystem keeps the filesystem busy.