ST-419 ST412 MFM

                       OPTION SHUNT BLOCK
                            +--\---/--+
                          1 |   R     | 16
                          2 |   NC    | 15
                          3 |   NC    | 14
                          4 |   NC    | 13
                          5 |   DS4   | 12
                          6 |   DS3   | 11
                          7 |   DS2   | 10
                          8 |   DS1   | 9
                            +---------+

                     DS1,DS2,DS3,DS4=DRIVE SELECTED
                         R=RADIAL OPERATION

                              ST - 419

       UNFORMATTED CAPACITY (MB) ________________19.14
       FORMATTED CAPACITY (32 SECTORS) (MB) _____15.0
       ACTUATOR TYPE ____________________________STEPPER
       TRACKS ___________________________________612
       CYLINDERS ________________________________306
       HEADS ____________________________________6
       DISCS ____________________________________3
       MEDIA TYPE _______________________________OXIDE
       RECORDING METHOD _________________________MFM
       TRANSFER RATE (mbits/sec) ________________5.0
       INTERFACE ________________________________ST412
       TPI (TRACKS PER INCH) ____________________345
       BPI (BITS PER INCH) ______________________9,074
       AVERAGE ACCESS (ms) ______________________85
       SINGLE TRACK SEEK (ms) ___________________< 16.67
       MTBF (power-on hours) ____________________11,000

       POWER REQUIREMENTS: +12V START-UP (amps) _3.5
                           +12V TYPICAL (amps) __1.6
                           +5V TYPICAL (amps) ___1.1
                           TYPICAL (watts) ______24.7
                           MAXIMUM (watts) ______50
       BUFFERED STEP PULSE RATE (micro sec) _____5-500
       WRITE PRECOMP (cyl) ______________________128
       REDUCED WRITE CURRENT (cyl) ______________N/A (307)
       LANDING ZONE (cyl)________________________319
       IBM AT DRIVE TYPE ________________________N/A

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offerings or specifications. (6/26/90)


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