[Q] can NOT umount file system ????

[Mike Burger]

On Mon, April 3, 2006 9:58 am, mcclnx mcc wrote:
> We have  Redhat AS 3.4 on DELL server.  One of file
> system mount from  SAN can NOT "umount" even NO
> process relate to it.  Can anyone tell me how to
> umount it  without reboot.
>
> Thanks.
>
>
> # umount /u5
> umount: /u5: device is busy
> # fuser /u5
> /u5:
> No process references; use -v for the complete list
> # lsof /u5
> # fuser -km /u5
> # umount /u5
> umount: /u5: device is busy

Without knowing the layout of your system, two things come to mind:

1) Someone has a shell open, and is sitting in the directory/filesystem
2) You have another filesystem mounted as a subirectory of /u5, and /u5
can't be unmounted until that other filesystem is unmounted:

i.e. /u5 is mounted, and then /u5/joeschmoe is mounted as a subdir.

-- 
Mike Burger
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