From: tbc@netcom.com (Mike Garvey)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Seagate ST3283A, 245MB, 12ms access
Keywords: Seagate, hard drive
Date: 20 Aug 92 06:26:41 GMT
Distribution: comp.sys.ibm.pc.hardware
Organization: Netcom - Online Communication Services (408 241-9760 guest)

Culled from the Seagate BBS (number provided), here is the specsheet for the
SCSI version of that drive. Though there are undoubtedly differences between
this and the IDE version, ther should be enough similarities to get you
pointed in the right direction:

SEAGATE TECHNOLOGY, INC.
       Customer Technical Support FAX Network +1 408 438-8137
     Customer Technical Support Bulletin Boards (300-9600, 8-N-1)
|--------------------------------------------------------------------|
| United States    +1 408 438-8771 |  United Kingdom +44 628 478011  |
|----------------------------------+---------------------------------|
| Germany         +49  89 140-9331 |  Singapore      +65   227-2217  |
|--------------------------------------------------------------------|
                            (C)opyright 1991
 
 
 
ST-3283N
Rear View              |- 50 pin SCSI Interface I/O connector
                       |
                       |                    DC power
         (top)--------------------------- /-5-G-G-12\
          ----|::::::::::::::::::::::::1--| 0 0 0 0 --
      (bottom)--------------------------- |---------|
                 |-----1 |-----1 |-----1
                 |-----| |-----| |-----|
                  Terminating Resistor Packs
 
ST-3283N
Left View
              (top)                       ---
     Front....----------------------------| I/O connector
                                o o o     ---
               SCSI ID Address  o o o
                                | | |
                          ID 1 -| | |
                          ID 2 ---| |
                          ID 4 -----|
 
ST-3283N
Right View
           ---           1o o o
    DC Power ------------ o|o o6--------------------------------
           ---  1o o     -------                            o o
                 o|o4    Active/Passive Termination         o o
                -----    -------                            | |
     Terminator Power  |--------------------------------|   | | Remote Start
                -----  | Active: Pins 1 & 2 shorted     |   |-- Parity Enable
                  |    |         only (+2.85V to        |
                  |    |         110 O) for FAST        |
                  |    |         SCSI; default          |
                  |    |Passive: Pins 2 & 4 shorted     |
                  |    |         AND pins 5 & 6 shorted |
                  |    |         (+5V and GND to        |
                  |    |         220/330 O) for         |
                  |    |         standard SCSI.         |
                  |    |--------------------------------|
                  |
    |----------------------------------------------------------------------|
    |Terminator Power: From SCSI Connector ---------------- Pins 1 & 2     |
    |                  From Power Connector --------------- Pins 1 & 3     |
    |                  To SCSI Connector Only ------------- Pins 3 & 4     |
    |                  From Power Connector and ----------- Pins 1 & 2 AND |
    |                    to SCSI Bus --------------------------- 3 & 4     |
    |                 Terminating Resistors not Installed - Pins 2 & 4     |
    |----------------------------------------------------------------------|
 
ST-3283N
Front View                     Clock Ground -|     |- (Pin 3 removed for key)
                                             |     |
            (top)                       -o o o o o - o1
               -------------------------+o o o o o o o -----
            (bottom)                     | | | |-----|
                                         | | |   |
                         Remote LED -----| | |   |
                           Reserved -------| |   |
           Ext. Spindle Clock Synch ---------|   |
                           Reserved |            |
                           Reserved |------------|
                           Reserved |
                           Reserved |
 
 
                             ST-3283N
 
 
       UNFORMATTED CAPACITY _____________________
       FORMATTED CAPACITY (xx SECTORS) __________248.62
       AVERAGE SECTORS PER TRACK ________________57 rounded down
       ACTUATOR TYPE ____________________________STRAIGHT ARM
       TRACKS ___________________________________8,455
       CYLINDERS ________________________________1,691 (user)
       HEADS ____________________________________5
       DISCS (3.5 in) ___________________________3
       MEDIA TYPE _______________________________THIN FILM
       HEAD TYPE ________________________________THIN FILM
       RECORDING METHOD _________________________ZBR RLL (1,7)
       INTERNAL TRANSFER RATE (mbits/sec) _______15.0 to 24.4
       SPINDLE SPEED (RPM) ______________________4,500
       AVERAGE LATENCY (mSEC) ___________________6.67
       BUFFER ___________________________________128 Kbyte SeaCache
       INTERFACE ________________________________SCSI-2 Fast
       BYTES PER TRACK __________________________
       SECTORS PER DRIVE ________________________485,601
       TPI (TRACKS PER INCH) ____________________1,960
       BPI (BITS PER INCH) ______________________38,000
       AREAL DENSITY (MBits/sq in) ______________
       AVERAGE ACCESS (ms) ______________________12
       SINGLE TRACK SEEK (ms) ___________________<4
       MAX FULL SEEK (ms) _______________________35
       MTBF (power-on hours) Office _____________200,000
       POWER REQUIREMENTS: +12V START-UP (amps) _1.5
                           +5V TYPICAL (amps) ___0.55
       POWER MANAGEMENT (Watts):
                           ACTIVE _______________5.7
                           IDLE _________________3.5
                           STANDBY ______________1.0
                           SLEEP ________________
       WRITE PRECOMP (cyl) ______________________N/A
       REDUCED WRITE CURRENT (cyl) ______________N/A
       LANDING ZONE (cyl) _______________________AUTO
       IBM AT DRIVE TYPE ________________________0
 
       Physical:
                        Height (inches/mm):     1.00/25.4
                        Width  (inches/mm):     4.02/102.1
                        Depth  (inches/mm):     5.77/146.6
                        Weight    (lbs/kg):     1.5/0.68
 
Note: If FAST SCSI transfer rates are used, then the active
termination options must be used.  If the transfer rates are 5.0
MBytes/sec and below, either method of termination can be used.
Although active and passive terminated devices can be installed on the
same bus, both ends of the cable should be terminated in the same
manner, either both active or both passive.
 
Note: If your application requires no terminators, remove the
terminators from the circuit board.  Merely removing the terminator
power source selection jumper does not disconnect the terminator
resistors from the circuit.
 
ZBR = Zone Bit Recording = Variable sectors per track
 
Seagate reserves the right to change, without notice, product
offerings or specifications. (10/23/91)


Hope this helps.

(Wanders off mumbling something about it looks like a decent drive)

Be seeing you...
-- 
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Newsgroups: comp.sys.ibm.pc.hardware