OEM Disks for RT?

Thread View: comp.sys.ibm.pc.rt

3 messages

[T] Back to Threads [V] Tree View [G] Group Articles

3 total messages Started by Jamie Watson Wed, 13 Jan 1988 21:00

#1340

Author: Jamie Watson
Date: Wed, 13 Jan 1988 21:00

11 lines
821 bytes

Has anyone ever tried putting 3rd party disks into an RT?  Exactly what
kind of disks does it take?  The documentation says that the original cpu
machines use ESDI disks, while the new systems use Extended ESDI disks.
What is the difference between these - is it only a controller or formatting
issue, so the disks are physically the same?

If anyone has specific information about manufacturers or types of disks
that are known to work, that would be very helpful.

jw

Re: OEM Disks for RT?

#1341

Author: stiber
Date: Thu, 14 Jan 1988 17:43

31 lines
1704 bytes

Our RTs use ordinary AT hard disk controller cards.  We had added a
3rd party OEM Seagate 30M drive (originally intended for and used in
an AT) to one machine.  If you are running 4.3, you can use
"diskpart", "sautil", "minidisk", etc. to get the machine to
understand what the disk is, how it is to be partitioned, etc.  Of
course, this interface is slower than ESDI, but since we don't have
any ESDI hardware to play with...

   "Faith is good, but skepticism is better"
               - Giuseppe Verdi

			    Michael Stiber

   Email:                                     US Mail:
   stiber@cs.ucla.edu                  UCLA Computer Science Dept.
   ...{ucbvax,ihpn4}!ucla-cs!stiber    Machine Perception Laboratory
                                       3564 Boelter Hall
                                       Los Angeles, CA 90024


   "Faith is good, but skepticism is better"
               - Giuseppe Verdi

			    Michael Stiber

   Email:                                     US Mail:
   stiber@cs.ucla.edu                  UCLA Computer Science Dept.
   ...{ucbvax,ihpn4}!ucla-cs!stiber    Machine Perception Laboratory
                                       3564 Boelter Hall
                                       Los Angeles, CA 90024

Re: OEM Disks for RT?

#1339

Author: Laurence S. Kaplan
Date: Fri, 15 Jan 1988 16:52

32 lines
1978 bytes

In article <362@pan.UUCP> jw@pan.UUCP (Jamie Watson) writes:
>
>Has anyone ever tried putting 3rd party disks into an RT?  Exactly what
>kind of disks does it take?  The documentation says that the original cpu
>machines use ESDI disks, while the new systems use Extended ESDI disks.
>What is the difference between these - is it only a controller or formatting
>issue, so the disks are physically the same?
>
>If anyone has specific information about manufacturers or types of disks
>that are known to work, that would be very helpful.
>
>jw

As I have mentioned before in this news group, here at NYU we are currently
using three Micropolis 1355 (150 Mbyte)  disk drives on both ESDI and EESDI 
controllers from IBM.  Under ACIS 4.3 no code modifications are necessary 
(though they make things a little easier).  Contact Micropolis for information
about distribution in your area.  We also have on order a 1558 which gives
about 330 Mbyte formatted.

The difference between IBM ESDI and EESDI is that EESDI can use disks 
interleaved at 1:1 while ESDI needs 4:1.  Also EESDI can support up to
15Mhz transfer rates and multiple outstanding requests (assuming multiple
drives on the controller).
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Laurence S. Kaplan						     |
NYU Ultracomputer Research Project				    |||
715 Broadway  Rm. 1005						   |||||
New York, NY  10003						   |||||
(212) 998-3345							--- //\ ---
arpa:	kaplan@cmcl2						----/ \----
uucp:	{ihnp4,seismo}!cmcl2!kaplan				----   ----

Thread Navigation

This is a paginated view of messages in the thread with full content displayed inline.

Messages are displayed in chronological order, with the original post highlighted in green.

Use pagination controls to navigate through all messages in large threads.

Back to All Threads