Posted infilesystem linux
Troubleshooting the “device is busy” Error Attempting to umount a Disk
Before attempting to dismount a filesystem, it must be inactive. If “any user” has one of the filesystem’s directories as their current directory or has any file within the filesystem open, you will receive an error message, like the one below, when attempting to unmount the filesystem:
# umount /dev/dsk/c0t2d0s7 umount: /dev/dsk/c0t2d0s7: device is busy
Well, the fuser command to the rescue. The fuser command may be used to determine which files or directories within a filesystem are currently in use and to identify the processes and users that are using them.
