3B2 SCSI drives (was: First impressions: 3B2 120MB SCSI tape drive)

[Pim Zandbergen]

In article <901 at vsi.COM> friedl at vsi.COM (Stephen J. Friedl) writes:
>In article <539 at ctisbv.UUCP>, pim at 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 at iwtpm.ATT.COM (Verbiscer)
|Newsgroups: comp.sys.att
|Subject: AT&T 3B2 SCSI Announcement
|Keywords: 3B2 SCSI
|Message-ID: <132 at 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.
-- 
--------------------+------------------------------------+---------------------
Pim Zandbergen      | CTI Software BV                    | Phone: +31 70 542302 
pim at ctisbv.UUCP     | Laan Copes van Cattenburch 70      | Fax:   +31 70 512837
..!mcvax!ctisbv!pim | 2585 GD The Hague, The Netherlands | Telex: 32133 CTI NL