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Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!ucsd!swrinde!cs.utexas.edu!uunet!tank!ncar!boulder!grunwald@foobar.colorado.edu
From: grunwald@foobar.colorado.edu (Dirk Grunwald)
Newsgroups: comp.unix.ultrix,comp.sys.dec
Subject: Is my WREN using SYNC SCSI?
Message-ID: <12393@boulder.Colorado.EDU>
Date: 4 Oct 89 22:28:12 GMT
Sender: news@boulder.Colorado.EDU
Reply-To: grunwald@foobar.colorado.edu
Distribution: comp
Organization: University of Colorado at Boulder
Lines: 13


As anyone written a little Ultrix 3.1 program to probe the ioctl()
registers of the rz() device to see what's happening with a drive?

I want to see if my Wren V is actually running synch. SCSI rather than
async. I've enabled it in the kernel, but I'm only getting about
400Kb/s bandwidth, and you're supposed to get over 2Mb/sec. with the
synch. SCSI enabled.

On a similar note, has anyone figured out how to get the WREN to use
the 32Kb read-ahead cache?

Dirk Grunwald -- Univ. of Colorado at Boulder	(grunwald@foobar.colorado.edu)