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                         SEAGATE TECHNOLOGY, INC.
                              1-800-SEAGATE
                          http://www.seagate.com
                            (C)opyright 1997



ST-1480N SCSI-2

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  º REAR VIEW º
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         50 pin I/O Cable Connection
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       ÚÄÄÄÄÄÄ1 ÚÄÄÄÄÄÄ1 ÚÄÄÄÄÄÄ1 ÀÄ5ÄGÄGÄ12Ù
       ÀÄÄÄÄÄÄÙ ÀÄÄÄÂÄÄÙ ÀÄÄÄÄÄÄÙ
        ÀTerminating ResistorsÙ


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                 12345678
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FRONT         J6³::::::::³                                      BACK
 OF   ÍÍÍÍÍÍÍÍÍÍÏ1ÍÍÍÍÍÍÍÏÍÍÍÍÍÍPÍWÍAÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ  OF
DRIVE            ³³³³³³³³                                       DRIVE
     Factory Use Ù³³³³³³À Terminator Power (see below)³
     Motor Start ÄÙ³³³³ÀÄ Terminator Power (see below)ÃÄÄ¿
     Start Delay ÄÄÙ³³ÀÄÄ Reserved                       ³
   Write Protect ÄÄÄÙÀÄÄÄ Parity   ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄ¿
                                   ³ Termination Power-source Table ³
                                   ÃÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄ¿
                                   ³ 7 8    7 8   7 8                        ³
                                   ³  ÖÄ·  ÖÄ·   ÖÄÄÄ·  A Drive Supplies Own ³
                                   ³ øºøº  ºøºø  ÓøÄø½  B Drive Supplies Bus ³
                                   ³ øÓø½  Óø½ø   ø ø   C Bus Supplies Drive ³
                                   ³  A      B     C                         ³
                                   ÔÍÍÍÍÍÍÍÍÍÍÍÍPÍWÍAÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ;

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BACK     J5³:::³                                                FRONT
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DRIVE       ³³³                                                 DRIVE
      ID 4 ÄÙ³ÀÄ ID 1   If these ID jumpers are used,
           ID 2         then ID jumpers shown in front
                        view ARE NOT USED.


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  º FRONT VIEW º
  ÈÍÍÍÍÍÍÍÍÍÍÍͼ
                          If these ID jumper are used,
       ÕÍÍÍÍ͸            then ID jumpers shown in right side
     J7³:::::³            view ARE NOT USED.
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        ³³³³³
   ID 4 Ù³³³À Remote LED
   ID 2 ÄÙ³ÀÄ Spindle Synchronization (default jumper ON)
        ID 1

                              ST - 1480N

       UNFORMATTED CAPACITY (MB) ________________492
       FORMATTED CAPACITY (xx SECTORS) (MB) _____426*
       AVERAGE SECTORS PER TRACK ________________62
       ACTUATOR TYPE ____________________________VOICE COIL
       TRACKS ___________________________________13,302
       CYLINDERS ________________________________1476 (user)
       HEADS ____________________________________9
       DISCS ____________________________________5
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________ZBR
       INTERNAL TRANSFER RATE (mbits/sec) _______17 to 25
       SPINDLE SPEED (RPM) ______________________4,412
       AVERAGE LATENCY (mSEC) ___________________6.8
       BUFFER ___________________________________64 Kbyte
         Read Look-Ahead, Adaptive,
         Multi-Segmented Cache
       INTERFACE ________________________________SCSI-2
       BYTES PER TRACK __________________________37,037 avg
       SECTORS PER DRIVE ________________________823,608
       TPI (TRACKS PER INCH) ____________________1760
       BPI (BITS PER INCH) ______________________
       AVERAGE ACCESS (ms) ______________________14
       SINGLE TRACK SEEK (ms) ___________________2.5
       MAX FULL SEEK (ms) _______________________26
       MTBF (power-on hours) ____________________150,000
       POWER REQUIREMENTS: +12V START-UP (amps) _2.5
                           +12V TYPICAL (amps) __0.54
                           +5V TYPICAL (amps) ___0.53
                           TYPICAL (watts) ______9.1
                           MAXIMUM (watts) ______15
       BUFFERED STEP PULSE RATE (micro sec) _____
       WRITE PRECOMP (cyl) ______________________N/A
       REDUCED WRITE CURRENT (cyl) ______________N/A
       LANDING ZONE (cyl)________________________AUTO PARK
       IBM AT DRIVE TYPE ________________________0 or NONE

 * 512 bytes per sector, one spare sector per track,
   two spare cylinders per unit.

Already low-level formatted at the factory.
ZBR = Zone Bit Recording = Variable sectors per track

Seagate reserves the right to change, without notice, product
offerings or specifications. (9/24/97)

A copy of this specification file may be obtained by FTP at
ftp://ftp.seagate.com/techsuppt/scsi/st1480n.txt.