Date: Wed, 20 Oct 1999 14:33:39 -0400 From: Mike Tancsa <mike@sentex.net> To: freebsd-current@freebsd.org Subject: AMRD (MegaRAID) BIOS rev another other questions Message-ID: <3.0.5.32.19991020143339.016e0210@staff.sentex.ca>
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Is anyone else playing with the MegaRAID series of controllers ? I just
started testing one out today (My Mylex comes later this week). I noticed
the BIOS is V 1.38 dated June 10 1996. Should I upgrade it ? What have
others tested / used?
I have been playing for now with RAID 0 to get a sense of various
performance settings, which can dramatically effect bonnie and iozone
results. e.g. Write Back vs write through and stripe size. The eventual
purpose will be for a SQUID server in a couple of months once the drivers
are back ported.
e.g. same drives, but with Write back and a 128K stripe size vs. the default
-------Sequential Output-------- ---Sequential Input--
--Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block---
--Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec
%CPU
40 16341 99.1 20746 38.3 20307 52.7 14187 100.0 94033 98.2
9744.2 99.8
v.s.
Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done...
-------Sequential Output-------- ---Sequential Input--
--Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block---
--Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec
%CPU
40 10952 66.9 11622 22.6 9564 30.1 14230 100.0 63604 100.0
6944.5 99.8
------------------------------------------------------------------------
Mike Tancsa, tel 01.519.651.3400
Network Administrator, mike@sentex.net
Sentex Communications www.sentex.net
Cambridge, Ontario Canada
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