[mythtv-users] XFS: options when running mkfs.xfs
mythtv at cholich.com
Thu Sep 6 18:32:02 UTC 2007
On 9/5/07, Michael T. Dean <mtdean at thirdcontact.com> wrote:
> On 09/05/2007 10:45 AM, John Goerzen wrote:
> Basically, I had 200GB of data on the disk that was severely
> fragmented. It took me 10 hours to read that data from the disk and
> write it to another local disk (on another bus). That means the average
> read performance was at least 5.5MB/sec--far more than enough for the
> max 19.39Mbps (2.4MB/sec) of my OTA ATSC recordings. However, while
> /most/ parts of most shows played perfectly well, there were sections
> where the fragmentation caused read performance to drop to the point
> that it would play 1 second, then pause for 5-10 seconds, then play 1
> second. Once I copied the data to another drive and moved it back, the
> shows played perfectly, and without issue.
Now you got me worried. What tool and more importantly what metrics do you
use to figure out if disk/io is having hard time? iostats?
Since I just added dual hd receiver I'll most likely hit the SD/HD scenario
in the near future.
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