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From: agnew@trwrc.UUCP (R.A. Agnew)
Newsgroups: comp.sys.ibm.pc
Subject: Compaq Deskpro & MSDOS
Message-ID: <213@trwrc.UUCP>
Date: Fri, 28-Aug-87 13:38:28 EDT
Article-I.D.: trwrc.213
Posted: Fri Aug 28 13:38:28 1987
Date-Received: Sun, 30-Aug-87 06:18:39 EDT
Organization: TRW-MEAD, San Diego, Ca.
Lines: 17
Keywords: deskpro dos rll disks unix

There semms to be some Compaq people out there. I have a
Deskpro (original) and changed the hard disk to a Vertex V170.
I run it with an Omti 5527 RLL controller which gets 90M bytes
very reliably. The access time is 19 ms for a 32M partition, 1:1
interleave, and the xfer rate is 7.5 Mbits. I used to run Compaq
MS-DOS 3.2 but had to change to PC-DOS 3.2 because Compaq Dos won't
support a disk which does not have 17 sectors per cylinder. The RLL
puts 26 sectors on a cylinder. PC Dos doesn't seem to care and 
works fine. Why does Compaq have to keep trying to prevent people 
from doing thier own add-ons! DOS works just fine without Compaq 
screwing it up! My question is whether Compaq/MS-Dos 3.3 will
support other than "standard" hard disks. Apparently enhdisk.sys
will have to be rewritten. Using PC-Dos is okay
but I have to use the Irwin Tape software (better) and copy
the mode file from Compaq Dos. This disk change allows me to
run Sys V.2 on the DSI-32 coprocessor without gaging so badly
on disk transfers, but SCSI without DOS would be a lot better.