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Subject3ware RAID1 sequential read speed slower than write speed (2.4.8-ac10)
P3-450 with 256MB RAM with a 3ware 6200 attached to 2 20GB Western
Digitial 7200RPM Caviar Drive WD200BB

Running bonnie++ <http://www.coker.com.au/bonnie++/> on both an ext3
and ext2 partition, I get the following results

Version 1.01d ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
ext3 512M 6020 98 41022 57 6673 8 4619 77 21834 14 237.1 2


Version 1.01d ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
ext2 512M 6385 99 39969 32 9371 10 5540 91 27864 14 320.7 2


Whilst, I think the write performance is quite good. The read
performance seems to be quite bad. I expected read performance to be
better than write performance for RAID-1 configuration

Any ideas,patches to try ?

Regards, Yusuf
--
Yusuf Goolamabbas
yusufg@outblaze.com
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