************************************************************
                         Miniscribe Disk Drive Specifications
                                        For
                                    Model: 3053
             ************************************************************

             FORM FACTOR                           5.25 inch HH
             INTERFACE                              ST412/ST506
             DATA ENCODING METHOD                           MFM
             DATA TRANSFER RATE (Mbit/Sec)                  5.0

             DISK DRIVE CHARACTERISTICS
                HEADS                                         5
                CYLINDERS                                  1024
                SECTORS/TRACK (512 Byte Sectors)             17
                WRITE PRECOMPENSATION CYLINDER              512
                REDUCED WRITE CURRENT CYLINDER             1024
                MINIMUM STEP PULSE RATE (micro-Seconds)       6
                UNFORMATTED BYTES/TRACK                  10,416
                RADIAL TRACK DENSITY (TPI)                1,033
                ROTATIONAL SPEED (RPM)                    3,600
                UNFORMATTED CAPACITY (Millions of Bytes)   53.3
                FORMATTED CAPACITY (Millions of Bytes)     44.6
                FORMATTED CAP. (MB = 1,048,576 Bytes)      42.5

             ACCESS TIMES (mSec)*
                SINGLE TRACK                                  5
                AVERAGE OF ALL POSSIBLE SEEKS                25
                MAXIMUM                                      55
             *(BASED ON A 6 MICRO-SECOND STEP RATE)
             *(INCLUDES SETTLING)

             POWER REQUIREMENTS
                DISSIPATION (Watts)
                   TYPICAL                                 12.4
                   MAXIMUM                                 24.0
                CURRENT (Amps)
                   +5 V DC (+ or - 5%)                      0.8
                   +12 V DC (+ or - 5%)                     0.7
                   MAXIMUM STARTUP CURRENT                  2.0
                   MAXIMUM STARTUP TIME (Sec)                25

             PHYSICAL DIMENSIONS
                HEIGHT (in)                               1.625
                WIDTH (in)                                 5.75
                DEPTH (in)                                    8
                WEIGHT (lbs)                                  3

             OPERATIVE ENVIRONMENTAL LIMITS
                MINIMUM TEMPERATURE (Centigrade)             10
                MAXIMUM TEMPERATURE (Centigrade)             50
                THERMAL GRADIENT (Degrees C/Hour)            10

             RELIABILITY
                MTBF (Hours)                             30,000
                MTTR (Minutes)                               30
                COMPONENT DESIGN LIFE (Years)                 5