[mythtv-users] Problems with External USB Drives

[Jonno]

On Wed, Nov 26, 2008 at 8:47 AM, Jonno <jonnojohnson at gmail.com> wrote:
> On Wed, Nov 26, 2008 at 8:41 AM, Aaron Klein <klein.aaron at gmail.com> wrote:
>> 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
>
> Ok cool got it running now. Any idea how long a 750GB 7200rpm HDD will
> take? Also I'm wondering if I have enough space on the drive for it to
> work well. I have 5GB set aside through Myth but many of the files
> will be larger than that.
>
Hmm, the drive froze during the defrag.
"bad write of 16773120 bytes to /media/disk/.fsr/ag1/tmp7231: Input/output error
could not remove tmpdir: /media/disk/.fsr/ag0: Input/output error.."

Will try again. Any suggestions?