Re: One disk busy in RAID5?

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On Saturday July 30, scott-raid@xxxxxxxxxxxx wrote:
> I'm doing a big rsync to my 5 disk RAID 5 partition and am seeing an
> uneven loading of my disks.  The files are almost all huge video files.
> Has anyone got any idea what I could have done wrong?
> 
> md6 : active raid5 sdi1[4] sdh1[3] sdg1[2] sdf1[1] sde1[0]
>       976783360 blocks level 5, 128k chunk, algorithm 2 [5/5] [UUUUU]
> 
> The filesystem is ext3 created with 
> mkfs.ext3 -R stride=32 /dev/md6

I suggest you ask on ext3-users@xxxxxxxxxxx
I have seen references to this sort of thing before.  I think some
metadata gets aligned despite the '-R stride=' flag.
Also, I think the stride should be 128 (32 fs-blocks per chunk, 4
chunks per stripe).

NeilBrown
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