[9260] in linux-scsi channel archive
Ultra160-SCSI, AIC7899
daemon@ATHENA.MIT.EDU (Steven Timm)
Thu Jul 27 19:28:12 2000
Date: Thu, 27 Jul 2000 18:22:58 -0500 (CDT)
From: Steven Timm <timm@fnal.gov>
To: linux-scsi@vger.rutgers.edu
Message-ID: <Pine.LNX.4.21.0007271818170.6453-100000@sapphire.fnal.gov>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
I notice that there is earlier discussion in the archives that
Ultra160 was broken, but Doug's reply was that it had been fixed in
5.1.29 version of the driver.
I am currently running version 5.1.31 of the driver, but have
played with all versions from 5.1.22 through 5.1.31 in the last few
days, mingled with various kernels 2.2.13 on through 2.2.16-4.
I have a UltraSCSI/160 Adaptec AIC-7899 controller and
3 Seagate "Cheetah" drives. The best write performance
I have seen out of this using Bonnie is just less than 10 Mb/sec (block
writes on a 1 Gb file),
and most of the time it is a lot worse. Older kernels tend to do better.
Does anyone have a fix that can get this performance up to the
20 Mb/sec range that it should be in? Could we have a termination
problem or something?
Thanks for any help you can provide.
------------------------------------------------------------------
Steven C. Timm (630) 840-8525 timm@fnal.gov http://home.fnal.gov/~timm/
Fermilab Computing Division/Operating Systems Support
Central Systems Support Group--Computing Farms Operations
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