From: davem@ersys.edmonton.ab.ca (Dave McCrady)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: SEAGATE ST251 INFO needed
Date: Mon, 07 Sep 92 23:19:02 MDT
Organization: Edmonton Remote Systems #7, Edmonton, AB, Canada

djr48312@uxa.cso.uiuc.edu (X X) writes:

- Need Sector, Tracs, Head count for the Seagate ST 251 drive.  Would really li
- the seagate BBS phone number.  But could use the info.  Also there is a jumpe
- in the rear of the drive.  The drive is to be used as the first drive with
- an IDE 2HD/2FD card to power the floppies.  A WD card powers the HD.  Need
- to know which position the jumper should be, and the above info to put in
- CMOS.
- 
- 

Here's the bumph:

SEAGATE TECHNOLOGY, INC.
Technical Support Bulletin Board
408/438-8771  [300-9600 HST, MNP 3/5, N-8-1]
(C)opyright  1990                           

ST-251

                                                          +-4-3-2-1-+
                                                          | O O O O | Power
              o o o o o o o o                             +---------+
  +Data Cable o o o o o o o o  +Controller Cable    1       5 G G 12
 ========= == | | | | | | | | ==================== ===   ============
              | | | | | | | | +------------1
              | | | | | | | | +-Terminator-+
              | | | | | | | |
Drive Select->1 2 3 4 | | | + Radial
                | | | | | +-- Reserved
                | +++ | +---- Write Fault
                |  |  +------ Factory Test
                |  +--------- Never Used (Drive Select 3 and 4)
                + If twisted cable, use Drive Select 2

                          ST - 251

       UNFORMATTED CAPACITY (MB) ________________51.2
       FORMATTED CAPACITY (17 SECTORS) (MB) _____42.8
       ACTUATOR TYPE ____________________________STEPPER
       TRACKS ___________________________________4,920
       CYLINDERS ________________________________820
       HEADS ____________________________________6
       DISCS ____________________________________3
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________MFM
       TRANSFER RATE (mbits/sec) ________________5.0
       INTERFACE ________________________________ST506
       TPI (TRACKS PER INCH) ____________________777
       BPI (BITS PER INCH) ______________________9,935
       AVERAGE ACCESS (ms) ______________________40/28*
       SINGLE TRACK SEEK (ms) ___________________8
       MTBF (power-on hours) ____________________100,000
       POWER REQUIREMENTS: +12V START-UP (amps) _2.0/2.5*
                           +12V TYPICAL (amps) __0.5
                           +5V TYPICAL (amps) ___1.0/1.2*
                           TYPICAL (watts) ______11/12*
                           MAXIMUM (watts) ______29/36*
       BUFFERED STEP PULSE RATE (micro sec) _____3-200
       WRITE PRECOMP (cyl) ______________________N/A (821)
       REDUCED WRITE CURRENT (cyl) ______________N/A (821)
       LANDING ZONE (cyl)________________________AUTO PARK
       IBM AT DRIVE TYPE ________________________44, 40, or 3**

       *ST251-0/ST251-1
       **MAY REQUIRE PARTITIONING SOFTWARE

Seagate reserves the right to change, without notice, product
offerings or specifications. (6/26/90)

Dave McCrady              davem@ersys.edmonton.ab.ca