[mythtv-users] Horrendous RAID-6 performance

Andy Burns fedora at adslpipe.co.uk
Sat Mar 29 10:05:13 UTC 2008


On 28/03/2008 21:34, Yan Seiner wrote:
> My system has a 1.2 TB RAID-6 formatted as a single ext3 partition.  All
> was well for a while, then I had a minor crash, and had to repair the
> raid. (manual fsck kind of repair).
> 
> Now I get absolutely horrible RAID performance:

check the readahead parameter for the individual disk devices and the 
array block device (and the LVM if you're using that on top) using

blockdev --report

make sure the array has at least the same size as the disks, if 
necessary increase with

blockdev --setra [nnnn]




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