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

ST-157N

                                                 /ΔΔΔΏ
                                                 ³ O ³12
                                                 ³ O ³G
                                                 ³ O ³G
                                                 ³ O ³5
                                                 \ΔΔΔΩ
        ΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝΝ
          o o o o o   .........................
          o o o o o   .........................
          1 2 4 ³ P ΪΔΔΔΔΔΔ1ΪΔΔΔΔΔΔ1ΪΔΔΔΔΔΔ1
          ΔΔΒΔΔ ³ ³ ΐΔΔΔΔΔΔΩΐΔΔΔΔΔΔΩΐΔΔΔΔΔΔΩ
            ³   ³ ³    ΐ Resistor Termination Packs
            ³   ³ ³
            ³   ³ ΐΔ Parity Check enable
            ³   ΐΔΔΔ Not Used
            ΐΔΔΔΔΔΔΔ Drive ID's, ID 0 (none) for single drive system

                         ST - 157N

       UNFORMATTED CAPACITY (MB) ________________57
       FORMATTED CAPACITY (26 SECTORS) (MB) _____48.6
       ACTUATOR TYPE ____________________________STEPPER
       TRACKS ___________________________________3,678
       CYLINDERS ________________________________615
       HEADS ____________________________________6
       DISCS ____________________________________3
       MEDIA TYPE _______________________________THIN FILM
       RECORDING METHOD _________________________RLL
       TRANSFER RATE (mbits/sec) ________________7.5
       INTERFACE ________________________________SCSI
       TPI (TRACKS PER INCH) ____________________824
       BPI (BITS PER INCH) ______________________22,430
       AVERAGE ACCESS (ms) ______________________40/28*
       SINGLE TRACK SEEK (ms) ___________________8
       MTBF (power-on hours) ____________________70,000
       POWER REQUIREMENTS: +12V START-UP (amps) _2.0
                           +12V TYPICAL (amps) __0.35
                           +5V TYPICAL (amps) ___0.9
                           TYPICAL (watts) ______9
                           MAXIMUM (watts) ______29
       BUFFERED STEP PULSE RATE (micro sec) _____3-200
       WRITE PRECOMP (cyl) ______________________N/A (616)
       REDUCED WRITE CURRENT (cyl) ______________N/A (616)
       LANDING ZONE (cyl)________________________AUTO PARK
       IBM AT DRIVE TYPE ________________________0 or NONE

       *ST157N-0/ST157N-1

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