*BSD News Article 25406


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From: jkh@whisker.lotus.ie (Jordan K. Hubbard)
Newsgroups: comp.os.386bsd.misc
Subject: Re: FreeBSD FAST SCSI-II performance...
Date: 29 Dec 1993 12:36:51 GMT
Organization: Dublin, Ireland
Lines: 27
Distribution: world
Message-ID: <JKH.93Dec29043651@whisker.lotus.ie>
References: <2fqsee$b16@cruella.ee.pdx.edu>
NNTP-Posting-Host: whisker.lotus.ie
In-reply-to: erich@cruella.ee.pdx.edu's message of 28 Dec 1993 19:10:06 -0800

In article <2fqsee$b16@cruella.ee.pdx.edu> erich@cruella.ee.pdx.edu (Erich S. Boleyn) writes:
   Anyway, my question is:  What kind of performance should I expect
   when running the UntraStor 34F LB controller in FAST SCSI-II mode?

You should get very good performance - one of our developers just
got himself one of these (I presume you mean an `UltraStor' :-) and
says it screams.

   The system runs reliably, so I don't think it is any kind of
   motherboard error, but it is just way too slow for FAST &
   synchronous operation.

Get the freely available iozone program and run it - let me know what it
says.  I'm curious how slow "slow" is.

   I have it connected to a Barracuda I FAST SCSI-II hard drive,
   with the jumpers to initiate synchronous operation (etc.), but
   when running a simple benchmark, only get throughputs of just
   under 1 MB/sec  (not so hot).  Seek times are fast enough,

How is the controller itself set up?  Is it possible you have it
misconfigured?

				Jordan
--
(Jordan K. Hubbard)  jkh@violet.berkeley.edu, jkh@al.org, jkh@whisker.lotus.ie
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