[Lustre-discuss] umount on client - device busy

[Johann Lombardi]

On Jun 16, 2009, at 9:17 PM, Carlos Santana wrote:
> I am unable to unmount file system from the client. The (test)  
> installation is a single node type with MDS-OST-client running on  
> same machine. Following are the error messages with umount command  
> (even with -f):
>
> --- ---
> umount: /mnt/lustre: device is busy
> umount: /mnt/lustre: device is busy
>
> (device/resource busy with -f option)
> --- ---
>
> What process might be accessing the device?

You can use lsof or fuser to get the list of processes using the  
filesystem.

Cheers,
Johann