Date: Sun, 02 Jul 1995 14:12:43 +1000 From: Stephen Hocking <sysseh@devetir.qld.gov.au> To: syssgm@devetir.qld.gov.au Cc: bugs@freebsd.org Subject: Found problem with seagate performance Message-ID: <199507020412.EAA00792@netfl15a.devetir.qld.gov.au>
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You may recall that I was using the 2.0 seagate.c with BLIND_TRANSFERS turned
off and pulling a miserable 150k/sec via a dd from the raw device. After
adding the second drive I then had to alter the code so that it would turn off
messages (aka disconnect) otherwise the timeouts kept on coming back. I had a
thought which suggested that the TMC-885 actually had problems with the
disconnects, not the blind xfers and turned the blind assembler xfers back on.
Zowie! it pulls something over 900k/sec off the Wren 6, and 400k/sec off the
Quantum. It also passes my stress tests. Now that I know that the TMC-885 has
a problem with disconnects and the like, I'll have a look at the -current
seagate.c and see if I can fix it.
Stephen
I do not speak for the Worker's Compensation Board of Queensland -
They don't pay me enough for that!
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