Quoting Hubert Verstraete <hubskml@xxxxxxx>:
Hi All,
My RAID 5 array is running slow.
I've made a lot of test to find out where this issue is laying.
I've come to the conclusion that once the array is created with mdadm
2.6.x (up to 2.6.4), whatever the kernel you run, whatever the mdadm
you use to re-assemble the array, the array's performance is very
degraded.
Would this be a bug in mdadm 2.6 ?
Are you seeing this issue too ?
I may have seen this before too.
What happens if you don't make an array that is partitionable?
Just create an /dev/mdx device, or, if you must use a partitionable array,
what happens to your benchmarks on your 2nd partition of your array?
Say, /dev/md_d0p2 ?
My symptons were similar that any partitionable Raid 5 array would be
slower, but ony on the first partition.
mdadm version 2.5.6
kernel 2.6.18
Mike
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