2120S Stripe - abysmal performance

Jens Schweikhardt schweikh at schweikhardt.net
Wed May 12 11:33:43 PDT 2004


On Wed, May 12, 2004 at 11:48:06AM -0600, Scott Long wrote:
...
# I can't remember how the 2100 BIOS works, I'll have to take a look.
# I thought that it was an attribute that was set when the array is
# created.

Yes, and once its set at array creation time it apparently can not be
changed. I deleted the array and created it anew to disable read
caching. This did not yield any perfomance gain by itself. After I
changed the cables I now have 79MB/s (formerly only 29MB/s, a single
disk has a sustained read speed of 71MB/s at the outer sectors). Next
thing will be going back from forced U160 mode to U320. I'll report the
results, so watch this space :-)

Regards,

	Jens
-- 
Jens Schweikhardt http://www.schweikhardt.net/
SIGSIG -- signature too long (core dumped)


More information about the freebsd-scsi mailing list