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  │
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                            (C)opyright 1991



ST-1239NS (94351-230S) Swift SCSI

     ┌───\
     │ 0 │  5
     │ 0 │  G
     │ 0 │  G
     │ 0 │ 12  ....................  o o o o o o
     └───/     1...................  o o o o o o
     ════╤══════╤═╤══════╤═╤══════╤══════════════
         1──────┘ 1──────┘ 1──────┘  1 2 4 │ │ │
           Terminator Resistors      ──┬── │ │ │
                                       │   │ │ │   Terminator Power Select
            Drive ID, binary - use ┼───┘   │ │ │   Header located on the side
             ID 0 (no jumpers) for │       │ │ │   ──────────────────────────
              single drive install ┘       │ │ │  (Back) A B (Front of drive)
            Enable Parity Checking ────────┘ │ │         C D
         Enable Motor Start Option ──────────┘ │      ══╤══════════P═W═A
              Synchronized Spindle ────────────┘        │
                                                        │
              ┌─────────────────────────────────────────┘
             ─┼─
             A-B      Drive from Power Connector (factory default)
             A-C      Drive from SCSI Bus
             A-C&B-D  Drive from Power Connector and Provide to SCSI Bus
             B-D      Only provide to SCSI Bus

                 Swift with Shrouded SCSI Connector
     ┌───\
     │ 0 │  5    ┌─ If the SCSI connector has a plastic shroud,
     │ 0 │  G    │   note pin-1 on cable and T-res.
     │ 0 │  G    │
     │ 0 │ 12 ╔════════════════════╗ o o o o o o
     └───/    ║:::::::::::::::::::1║ o o o o o o
     ════╤══════╤═╤══════╤═╤══════╤══════════════
         └──────1 └──────1 └──────1  1 2 4 │ │ │
           Terminator Resistors      ──┬── │ │ │
                                       │   │ │ │   Terminator Power Select
            Drive ID, binary - use ┼───┘   │ │ │   Header located on the side
             ID 0 (no jumpers) for │       │ │ │  ──────────────────────────
              single drive install ┘       │ │ │  (Back) A B (Front of drive)
            Enable Parity Checking ────────┘ │ │         C D
         Enable Motor Start Option ──────────┘ │      ══╤══════════P═W═A
              Synchronized Spindle ────────────┘        │
                                                        │
              ┌─────────────────────────────────────────┘
             ─┼─
             A-B      Drive from Power Connector (factory default)
             A-C      Drive from SCSI Bus
             A-C&B-D  Drive from Power Connector and Provide to SCSI Bus
             B-D      Only provide to SCSI Bus


                             ST-1239NS
                          94351-230S Swift

       UNFORMATTED CAPACITY (MB) ________________239
       FORMATTED CAPACITY (36 SECTORS/1 SPARED)__204.2
       ACTUATOR TYPE ____________________________VOICE COIL
       TRACKS ___________________________________11,412
       CYLINDERS ________________________________1,268
       HEADS ____________________________________9
       DISCS ____________________________________5
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________RLL (2,7)
       TRANSFER RATE (mbytes/sec) _______________1.25
       SPINDLE SPEED (RPM) ______________________3,600
       AVERAGE LATENCY (mSEC) ___________________8.33
       BUFFER ___________________________________32 or 64 Kbyte
         Read Look-Ahead, Non-Adaptive,
         Single-Segmented
       INTERFACE ________________________________SCSI
       SECTORS PER DRIVE ________________________398,790
       TPI (TRACKS PER INCH) ____________________1,543
       BPI (BITS PER INCH) ______________________30,000 max
       AVERAGE ACCESS (ms) ______________________15
       SINGLE TRACK SEEK (ms) ___________________4
       MAX FULL SEEK (ms) _______________________35
       MTBF (power-on hours) ____________________150,000
       POWER REQUIREMENTS: +12V START-UP (amps) _2.5
                           +12V TYPICAL (amps) __0.7
                           +5V START-UP (amps) __0.75
                           +5V TYPICAL (amps) ___0.4
                           TYPICAL (watts) ______11
                           MAXIMUM (watts) ______34
       BUFFERED STEP PULSE RATE (micro sec) _____6-200
       WRITE PRECOMP (cyl) ______________________N/A (1269)
       REDUCED WRITE CURRENT (cyl) ______________N/A (1269)
       LANDING ZONE (cyl) _______________________AUTO PARK
       IBM AT DRIVE TYPE ________________________0 or NONE

Already low-level formatted at the factory.


                          Swift Remote LED Option

               Front View of Drive Without the Plastic Bezel

                                  ┌───┬───┐
                                  │ A │ B │    B = Anode
                                  ├───┼───┤    D = Cathode
                                  │ C │ D │
              ...═════════════════╧═══╧═══╧═════P═W═A═══...


        ° Default jumper at C-D for LED mounted on drive PWA
        ° To use remote LED, remove jumper and extend B (Anode)
          and D (Cathode).
        ° Swift LED kit 75912397 allows connection to a remote LED
        ° Swift LED kit 95913369 has an LED for attachment to the
          system front bezel or a 5.25-inch frame kit

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