Error Code details
Severity: n/a 
Component: File System 
%s cannot unmount : %s

The first “%s” is the current mount point of the file system you are trying to unmount. The second “%s” is the reason that unmount failed.

When unmount fails and the reason is "Device Busy", two possible causes are:

  • The file system has a mounted storage checkpoint.

    To check if it does, run the following two commands:

    # df -n | grep ckpt
    # fsckptadm list /mount_point
  • The file system has a mounted file system snapshot (not a LUN or volume snapshot).


Veritas solutions
Solution 1 Vote: [Useful] [Not useful]
Last Modified: 2009-09-29 22:48:45 PST
Platform: Generic
Release: Generic

Unmount all mounted storage checkpoints, then unmount all file system snapshots, and, lastly, unmount the file system.


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