[mythtv-users] Problems with External USB Drives

[Aaron Klein]

On Wed, Nov 26, 2008 at 9:32 AM, Jonno <jonnojohnson at gmail.com> wrote:
> On Wed, Nov 26, 2008 at 2:45 AM, Robin Hill <myth at robinhill.me.uk> wrote:
>
>> 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
>
> Well it turns out it wasn't the eSATA/USB switch that was the problem
> since I woke up this morning to a frozen drive.
> I used xfs so I checked and the fragmentation level is 99.38%!!! Guess
> that might be the cause of some problems.
>
> My drive /dev/sdb1 is mounted at /media/disk so what do I need to run
> to defrag, xfs_fsr /media/disk?

sudo xfs_fsr /media/disk