In article <32rk0n$g9@cs.ubc.ca>, razzell@cs.ubc.ca (Dan Razzell) writes:
> I'm on the verge of buying a bunch of SCSI Fast/Wide 20MB/s disks to go
> on a Sparc 20 file server. Any guesses as to whether differential or
> single-ended is going to become most common out there in the Unix F/W
> marketplace?
Everybody says go differential for Fast/Wide. Technically it's more solid,
and from this small sample I get the impression that it's the more popular
choice.
There was one strange case that I think people might check out if they are
planning something like what I've described:
From: Bern Fox <bern@erim.org>
We've had three SS20/612, with thirty Seagate Elite 3, on four Sun
DWIS/S Sbus adapters running (sorta....) Solaris 2.3 since mid July.
On paper this is looks like like a good way to get some I/O
performance increases, but so far throughput has something less than
spectacular. The ST43401ND has really been a solid drive for us
in other configurations, but for some reason, yet to be explained, the
SS20 / DWIS/S / isp driver combination does not gracefully handle
real (or perceived) retryable read errors.
The jury is still out, but I would be willing to bet that something
from the patch-miesters at SSMC is forthcoming and might fix (mask)
the problem. Almost the same setup has been running since January
(SS10/512 (2), ST43401ND (16), Solaris 2.3) with SBS440-D Sbus cards
from Performance Tech. without a glitch.
Thanks to:
Bern Fox <bern@erim.org>
John DiMarco <jdd@cdf.toronto.edu>
Lewis E. Wolfgang <wolfgang@sunspot.nosc.mil>
Darrell Judd <judd_d@lms.com>
--
.^.^. Dan Razzell <razzell@cs.ubc.ca>
. o o . Laboratory for Computational Intelligence
. >v< . University of British Columbia
_____mm.mm_____ http://www.cs.ubc.ca/nest/lci
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