
             **************************************************************
                         Miniscribe Disk Drive Specifications
                                        For
                                    Model: 8051S
             **************************************************************

             FORM FACTOR                              3.5 inch HH
             INTERFACE                                       SCSI
             DATA ENCODING METHOD                         2,7 RLL
             DATA TRANSFER RATE (MByte/Sec)                   1.0

             DISK DRIVE CHARACTERISTICS
                HEADS                                           4
                CYLINDERS
                   MICROCODE LEVEL I222C OR LOWER             739
                   MICROCODE LEVEL I250C OR HIGHER            793
                SECTORS/TRACK (512 Byte Sectors)               28
                UNFORMATTED BYTES/TRACK                    17,220
                RADIAL TRACK DENSITY (TPI)                  1,109
                ROTATIONAL SPEED (RPM)                      3,484
                FORMATTED CAPACITY (MBytes)
                   MICROCODE LEVEL I222C OR LOWER            42.4
                   MICROCODE LEVEL I250C OR HIGHER           45.5
             ACCESS TIMES (mSec)*
                SINGLE TRACK                                    8
                AVERAGE OF ALL POSSIBLE SEEKS                  28
                MAXIMUM                                        60
             *(INCLUDES SETTLING)

             POWER REQUIREMENTS
                DISSIPATION (Watts)
                   TYPICAL                                    8.0
                CURRENT (Amps)
                   +5 V DC (+ or - 5%)                        0.5
                   +12 V DC (+ or - 5%)                       0.5
                   MAXIMUM STARTUP CURRENT                    2.0

             PHYSICAL DIMENSIONS
                HEIGHT (in)                                 1.625
                WIDTH (in)                                      4
                DEPTH (in)                                   5.75
                WEIGHT (lbs)                                 1.43

             OPERATIVE ENVIRONMENTAL LIMITS
                MINIMUM TEMPERATURE (Centigrade)                5
                MAXIMUM TEMPERATURE (Centigrade)               50
                THERMAL GRADIENT (Degrees C/Hour)              10

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



Revision A                                           Sandoval/Anderson
10/07/93
