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From: jvs@micas.UUCP (Jo stockley)
Newsgroups: comp.periphs
Subject: Re: Wanted: SCSI Disks for Sun3's
Message-ID: <536@micas.UUCP>
Date: Fri, 9-Oct-87 10:51:09 EDT
Article-I.D.: micas.536
Posted: Fri Oct  9 10:51:09 1987
Date-Received: Mon, 12-Oct-87 22:35:31 EDT
References: <128@quick.COM>
Organization: Nodecrest Ltd., Byfleet, England
Lines: 36

in article <128@quick.COM>, srg@quick.COM (Spencer Garrett) says:
> 
> 
> Here's the scoop.  Sun uses two types of disk controllers in their
> shoeboxes for 3/50's and 3/60's.  The 71Mb disk is an ST506 type
> with an Adaptec ACB4000A controller, and the 140Mb is an ESDI type
> with a modified Emulex MD21 controller.  I think the mods to the
> MD21 hardware are to make it look like an Adaptec, and Emulex is
> apparently bound by contract not to deliver the modified firmware
> to anybody but SUN, so count that out.

not so! We have been bying Emulex MD21 ESDI controllers from a supplier
and have been using them on the Sun 3/160 with both Micropollis and Siemens
discs (170 & 310 Mbyte) every since Sun first started supporting ESDI (which
for us was when we got release 3.2 of Sun UNIX). Adaptec produced an ESDI
SCSI interface that was supposed to emulate the ACB4000 but we were unable
to get it to work on the Sun without making changes to the sd.c driver
(which we do not have). Anybody who want's further info on any of this
contact me.

We also tried the ACB4070 rll ST506 interface before the ESDI support came
and it worked except that the Sun SCSI board is brain dammaged and cannot
handle the increased transfer rate (Also while I'm about it why the hell
did Sun ever produce a SCSI board that does nopt support DIS/RE CONNECT
and then supply it in a multi user system???

Oh well, thats my contribution, take it or leave it, I'm off to the pub!
Byeee
Jo.-- 
-------------
Jo. Stockley. (jvs@micas.uucp or ...!mcvax!ukc!micas!jvs)

Nodecrest Computer Systems Ltd
Byfleet, UK.

Phone: +44 09323 40555