On Wed, 4 May 2011 01:07:45 +0100 Liam Kurmos [off-list ref] wrote:

Hi,

I've been testing mdadm (great piece of software btw) however all my
test show that reading from raid1 is only the same speed as reading
from a single drive.

Why do you expect RAID1 to be faster?  On a single threaded sequential read
there is not much it can do to go faster than a single device.  Maybe on some
multi-thread random IOs it might.
What sort of tests were you running?

NeilBrown

Is this a known issue? or is there something seriously wrong with my
system? i have tried v2.8.1 and v.3.2.1 without difference and several
benchmarking methods.

best regards,

Liam