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From: mg@cs.Princeton.EDU (Michael Golan)
Newsgroups: comp.os.msdos.apps
Subject: Desqview: I get bad disk performance, please help
Message-ID: <2026@rossignol.Princeton.EDU>
Date: 21 Aug 90 05:50:25 GMT
Sender: news@cs.Princeton.EDU
Organization: Dept. of Computer Science, Princeton University
Lines: 19

I am running Desqview 2.26 / QEMM 5.0 on a 386 system. I have found that
when I run CORETEST (The disk performance program), after QEMM is loaded,
transfer performance are much higher (4-5 times)  than when I run it from
inside DV. This is also reflected in the timing of a COPY command.

I have tried to run DV w/o QEMM, and in that case the disk performance is
fine. I have also tried DV+QEMM with various parameters: no RAM, DMA=, etc.,
but it always gives bad performance. I also changed to run only a single
dos program, using the cpu alone, etc. - nothing seems to help.

I am using a PERSTOR disk controller, but I dont see why it should make any
difference. I even tried to move the interleave factor from 3 to 4, but
this only hurt performance slightly everywhere.

I would appreciate any suggestions!
Thanks
 Michael Golan
 mg@princeton.edu