[mythtv-users] Horrendous RAID-6 performance

[Billy Macdonald]

On Fri, Mar 28, 2008 at 5:51 PM, Yan Seiner <yan at seiner.com> wrote:
>
>  John Drescher
>
>
>  > can you post the output of cat /proc/mdstat
>
>  selene:/var/log# cat /proc/mdstat
>  Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
>  md10 : active raid6 sdd1[0] sdi1[5] sdh1[4] sdg1[3] sdf1[2] sde1[1]
>       1562834944 blocks level 6, 64k chunk, algorithm 2 [6/6] [UUUUUU]
>

can you try hdparm -tT /dev/sdd1 ( for all your drives)
(ps I'm not sure if that's totally safe, but I did it on the members
of my raid1 first to see if it let me.  It's just reading right :) )

I wonder if you have a failing drive or controller or channel and it's
not being detected.

Good luck
Billy