Path: utzoo!yunexus!geac!syntron!jtsv16!uunet!mcvax!hp4nl!ctisbv!pim
From: pim@ctisbv.UUCP (Pim Zandbergen)
Newsgroups: comp.sys.att
Subject: 3B2 SCSI drives (was: First impressions: 3B2 120MB SCSI tape drive)
Keywords: 3B2 SCSI ESDI
Message-ID: <543@ctisbv.UUCP>
Date: 26 Oct 88 13:49:49 GMT
Article-I.D.: ctisbv.543
References: <899@vsi.COM> <539@ctisbv.UUCP> <901@vsi.COM>
Reply-To: pim@ctisbv.UUCP (Pim Zandbergen)
Organization: CTI Software BV, The Hague, The Netherlands
Lines: 54

In article <901@vsi.COM> friedl@vsi.COM (Stephen J. Friedl) writes:
>In article <539@ctisbv.UUCP>, pim@ctisbv.UUCP (Pim Zandbergen) writes:
>> While I'm on the subject of comparing SCSI devices for the 3B2,
>> AT&T sells both native SCSI hard disks and ESDI hard disks that
>> need a SCSI-to-ESDI thing like the ones that come with the
>> 3B2/600. Does anybody have experience with both types?
>> How do they compare in speed?
>
>They are the same thing; *all* the drives are ESDI.
>

I think you think I was referring to the DM94/E, the DM/135E, the DM/147E
and the DM/300E packages. They need the Disk Controller Module (DCM/4E).

But I was referring to something else.

This is from a rather old posting in this group:

|From: rjv@iwtpm.ATT.COM (Verbiscer)
|Newsgroups: comp.sys.att
|Subject: AT&T 3B2 SCSI Announcement
|Keywords: 3B2 SCSI
|Message-ID: <132@iwtpm.ATT.COM>
|Date: 13 May 88 16:01:56 GMT
|Organization: AT&T Bell Laboratories - Naperville, Illinois
|
|
|       On May 9, 1988, AT&T announced the third	release	of SCSI
|       peripherals for the AT&T	3B2 computer family.  Included in
|       the announcement	were:
|
|
|	       Differential Host Adapter - Provides a differential
|			  SCSI interface for 3B2/500, 3B2/600, and
|			  3B2/700 Computers.
|
|	       DM/300S	- A package containing 1 300 MB	(formatted)
|			  disk with a built-in single-ended SCSI
|			  interface.
|	       DM/300DS	- A package containing 1 300 MB	(formatted)
|			  disk with a built-in differential SCSI
|			  interface.

[other announcements deleted]

Are these also ESDI devices? I don't think these are a DCM/4E
and a DM/300E put together in a box.
It was my hunch that the "E" in DM/300E stands for ESDI
and the "S" in DM/300S for SCSI.
-- 
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Pim Zandbergen      | CTI Software BV                    | Phone: +31 70 542302 
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