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  1. Path: sparky!uunet!olivea!hal.com!decwrl!csus.edu!netcom.com!tbc
  2. From: tbc@netcom.com (Mike Garvey)
  3. Newsgroups: comp.sys.ibm.pc.hardware
  4. Subject: Re: Seagate ST3283A, 245MB, 12ms access
  5. Keywords: Seagate, hard drive
  6. Message-ID: <kc#n#bn.tbc@netcom.com>
  7. Date: 20 Aug 92 06:26:41 GMT
  8. References: <4301@inca.comlab.ox.ac.uk>
  9. Distribution: comp.sys.ibm.pc.hardware
  10. Organization: Netcom - Online Communication Services (408 241-9760 guest)
  11. Lines: 158
  12.  
  13. Culled from the Seagate BBS (number provided), here is the specsheet for the
  14. SCSI version of that drive. Though there are undoubtedly differences between
  15. this and the IDE version, ther should be enough similarities to get you
  16. pointed in the right direction:
  17.  
  18. SEAGATE TECHNOLOGY, INC.
  19.        Customer Technical Support FAX Network +1 408 438-8137
  20.      Customer Technical Support Bulletin Boards (300-9600, 8-N-1)
  21. |--------------------------------------------------------------------|
  22. | United States    +1 408 438-8771 |  United Kingdom +44 628 478011  |
  23. |----------------------------------+---------------------------------|
  24. | Germany         +49  89 140-9331 |  Singapore      +65   227-2217  |
  25. |--------------------------------------------------------------------|
  26.                             (C)opyright 1991
  27.  
  28.  
  29.  
  30. ST-3283N
  31. Rear View              |- 50 pin SCSI Interface I/O connector
  32.                        |
  33.                        |                    DC power
  34.          (top)--------------------------- /-5-G-G-12\
  35.           ----|::::::::::::::::::::::::1--| 0 0 0 0 --
  36.       (bottom)--------------------------- |---------|
  37.                  |-----1 |-----1 |-----1
  38.                  |-----| |-----| |-----|
  39.                   Terminating Resistor Packs
  40.  
  41. ST-3283N
  42. Left View
  43.               (top)                       ---
  44.      Front....----------------------------| I/O connector
  45.                                 o o o     ---
  46.                SCSI ID Address  o o o
  47.                                 | | |
  48.                           ID 1 -| | |
  49.                           ID 2 ---| |
  50.                           ID 4 -----|
  51.  
  52. ST-3283N
  53. Right View
  54.            ---           1o o o
  55.     DC Power ------------ o|o o6--------------------------------
  56.            ---  1o o     -------                            o o
  57.                  o|o4    Active/Passive Termination         o o
  58.                 -----    -------                            | |
  59.      Terminator Power  |--------------------------------|   | | Remote Start
  60.                 -----  | Active: Pins 1 & 2 shorted     |   |-- Parity Enable
  61.                   |    |         only (+2.85V to        |
  62.                   |    |         110 O) for FAST        |
  63.                   |    |         SCSI; default          |
  64.                   |    |Passive: Pins 2 & 4 shorted     |
  65.                   |    |         AND pins 5 & 6 shorted |
  66.                   |    |         (+5V and GND to        |
  67.                   |    |         220/330 O) for         |
  68.                   |    |         standard SCSI.         |
  69.                   |    |--------------------------------|
  70.                   |
  71.     |----------------------------------------------------------------------|
  72.     |Terminator Power: From SCSI Connector ---------------- Pins 1 & 2     |
  73.     |                  From Power Connector --------------- Pins 1 & 3     |
  74.     |                  To SCSI Connector Only ------------- Pins 3 & 4     |
  75.     |                  From Power Connector and ----------- Pins 1 & 2 AND |
  76.     |                    to SCSI Bus --------------------------- 3 & 4     |
  77.     |                 Terminating Resistors not Installed - Pins 2 & 4     |
  78.     |----------------------------------------------------------------------|
  79.  
  80. ST-3283N
  81. Front View                     Clock Ground -|     |- (Pin 3 removed for key)
  82.                                              |     |
  83.             (top)                       -o o o o o - o1
  84.                -------------------------+o o o o o o o -----
  85.             (bottom)                     | | | |-----|
  86.                                          | | |   |
  87.                          Remote LED -----| | |   |
  88.                            Reserved -------| |   |
  89.            Ext. Spindle Clock Synch ---------|   |
  90.                            Reserved |            |
  91.                            Reserved |------------|
  92.                            Reserved |
  93.                            Reserved |
  94.  
  95.  
  96.                              ST-3283N
  97.  
  98.  
  99.        UNFORMATTED CAPACITY _____________________
  100.        FORMATTED CAPACITY (xx SECTORS) __________248.62
  101.        AVERAGE SECTORS PER TRACK ________________57 rounded down
  102.        ACTUATOR TYPE ____________________________STRAIGHT ARM
  103.        TRACKS ___________________________________8,455
  104.        CYLINDERS ________________________________1,691 (user)
  105.        HEADS ____________________________________5
  106.        DISCS (3.5 in) ___________________________3
  107.        MEDIA TYPE _______________________________THIN FILM
  108.        HEAD TYPE ________________________________THIN FILM
  109.        RECORDING METHOD _________________________ZBR RLL (1,7)
  110.        INTERNAL TRANSFER RATE (mbits/sec) _______15.0 to 24.4
  111.        SPINDLE SPEED (RPM) ______________________4,500
  112.        AVERAGE LATENCY (mSEC) ___________________6.67
  113.        BUFFER ___________________________________128 Kbyte SeaCache
  114.        INTERFACE ________________________________SCSI-2 Fast
  115.        BYTES PER TRACK __________________________
  116.        SECTORS PER DRIVE ________________________485,601
  117.        TPI (TRACKS PER INCH) ____________________1,960
  118.        BPI (BITS PER INCH) ______________________38,000
  119.        AREAL DENSITY (MBits/sq in) ______________
  120.        AVERAGE ACCESS (ms) ______________________12
  121.        SINGLE TRACK SEEK (ms) ___________________<4
  122.        MAX FULL SEEK (ms) _______________________35
  123.        MTBF (power-on hours) Office _____________200,000
  124.        POWER REQUIREMENTS: +12V START-UP (amps) _1.5
  125.                            +5V TYPICAL (amps) ___0.55
  126.        POWER MANAGEMENT (Watts):
  127.                            ACTIVE _______________5.7
  128.                            IDLE _________________3.5
  129.                            STANDBY ______________1.0
  130.                            SLEEP ________________
  131.        WRITE PRECOMP (cyl) ______________________N/A
  132.        REDUCED WRITE CURRENT (cyl) ______________N/A
  133.        LANDING ZONE (cyl) _______________________AUTO
  134.        IBM AT DRIVE TYPE ________________________0
  135.  
  136.        Physical:
  137.                         Height (inches/mm):     1.00/25.4
  138.                         Width  (inches/mm):     4.02/102.1
  139.                         Depth  (inches/mm):     5.77/146.6
  140.                         Weight    (lbs/kg):     1.5/0.68
  141.  
  142. Note: If FAST SCSI transfer rates are used, then the active
  143. termination options must be used.  If the transfer rates are 5.0
  144. MBytes/sec and below, either method of termination can be used.
  145. Although active and passive terminated devices can be installed on the
  146. same bus, both ends of the cable should be terminated in the same
  147. manner, either both active or both passive.
  148.  
  149. Note: If your application requires no terminators, remove the
  150. terminators from the circuit board.  Merely removing the terminator
  151. power source selection jumper does not disconnect the terminator
  152. resistors from the circuit.
  153.  
  154. ZBR = Zone Bit Recording = Variable sectors per track
  155.  
  156. Seagate reserves the right to change, without notice, product
  157. offerings or specifications. (10/23/91)
  158.  
  159.  
  160. Hope this helps.
  161.  
  162. (Wanders off mumbling something about it looks like a decent drive)
  163.  
  164. Be seeing you...
  165. -- 
  166. -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
  167. =  The Black Cursor (c) & TM  -=-  Sysop: Valhalla -- an Ogg-Net BBS  =
  168. =  Internet: tbc@netcom.com   -=-  (415) 221-4370  300-14,400bps 8N1  =
  169. =  GEnie: TBC   "No sir, I don't like it." - The Ren and Stimpy Show  =
  170. -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
  171.