[mythtv-users] Problems with External USB Drives

[Robin Hill]

On Tue Nov 25, 2008 at 09:35:18PM -0600, Jonno wrote:

> Seems like it would be a good idea to check fragmentation so I echo
> aaron's request for those commands (I'm a total linux noob). I can't
> remember right now if I chose xfs or jfs and I don't know how to set
> the file size allocation so I guess it's set at some default. Any
> other advice would be cool.
> 
Fragmentation checking will depend on the filesystem.  There's no
standard way of checking fragmentation (or defragging) an ext2 or ext3
drive (though there are some third party tools - shake is one I've
looked at).  I've no idea about JFS (never used that) but for xfs, you
can check the fragmentation level with:
    xfs_db -r -c frag /dev/sda1

and run a full defrag with:
    xfs_fsr /mnt/test

Note that the first requires a device name (and will run on a mounted
filesystem) whereas the second requires the mount point (and the
filesystem to be mounted).

HTH,
    Robin
-- 
     ___        
    ( ' }     |       Robin Hill        <myth at robinhill.me.uk>  |
   / / )      | Little Jim says ....                            |
  // !!       |      "He fallen in de water !!"                 |
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