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From: erich@cruella.ee.pdx.edu (Erich S. Boleyn)
Newsgroups: comp.os.386bsd.misc
Subject: FreeBSD FAST SCSI-II performance...
Date: 28 Dec 1993 19:10:06 -0800
Lines: 31
Message-ID: <2fqsee$b16@cruella.ee.pdx.edu>
NNTP-Posting-Host: cruella.ee.pdx.edu
Keywords: synch,scsi2,fast
X-Newsreader: NN version 6.5.0 #2 (NOV)
Greetings...
I have delved through the FAQ and many other postings, but can't
yet figure out what's going on (transferring the source to my
house will take a while, but I'm going to try that next).
Anyway, my question is: What kind of performance should I expect
when running the UntraStor 34F LB controller in FAST SCSI-II mode?
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.
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,
so the drive appears to run really quick, but the overall
transfer rate appears to be quite limited.
Does FreeBSD just have a slow bufferring method? What's
the deal?
Thanks for your time.
Erich Boleyn
--
"I haven't lost my mind; I know exactly where it is."
/ -- Erich Stefan Boleyn -- \ --=> *Mad Genius wanna-be* <=--
{ Honorary Grad. Student (Math) }--> Internet E-mail: <erich@cs.pdx.edu>
\ Portland State University / WARNING: INTERESTED AND EXCITABLE