DISK DRIVE SPECIFICATIONS

        MODEL: M2247SA                          PART NUMBER: B03B-4945-B211A

        INTERFACE: Single-ended SCSI            RECORDING CODE: RLL (1,7)

        CAPACITY----Unformatted: 181.5 Mbytes   Formatted: 148.7 Mbytes
                    Per Track: 20.864 Kbytes    Sectors/track: 36

        NUMBER OF---Heads:     7                Servo Tracks: Dedicated
                    Cylinders: 1243

        POSITIONING TIME:
                    Track to track: 4 msec.     Average: 18 msec.
                    Maximum:        36 msec.

        POSITIONING METHOD: Rotary Voice Coil Motor

        SPINDLE SPEED: 3,600 R.P.M.             AVERAGE LATENCY: 8.3 msec.

        DENSITY---Recording: 19,382 B.P.I.      Track: 1,294 T.P.I.

        DATA TRANSFER RATE
                    Async. Mode: 1.50 Mbytes/sec.
                     Sync. Mode: 2.50 Mbytes/sec. 

        BUFFER SIZE: 16 Kbytes                   TYPE: Dual Buffer

        START TIME: 20 sec. or less              STOP TIME: 15 sec. or less

        ERROR RATES:  Recoverable: 10 errors per 10E11 bits read
                      Non-recoverable: 10 errors per 10E15 bits read
                      Seek: 10 errors per 10E7 seeks

                              PHYSICAL SPECIFICATIONS

        DIMENSIONS: 146mm X 83mm X 218mm        WEIGHT: 3.5 Kg
        POWER REQUIREMENTS: +12V +/- 5% , +5V +/- 5%
               CONSUMPTION: 40 Watts

                                OPERATING          NON-OPERATING     
        Temperature - - - - | 5 C to 45 C       | -40 C to 60 C      |
        Humidity * - - - - -| 20% to 80% RH     |  5% to 95% RH      |
        Altitude - - - - - -| 0 m to 3,000 m    |  0 m to 12,000 m   |
        Vibration - - - - - | less than 0.2G    |  less than 0.4G    |
        Shock - - - - - - - | less than 2G      |  less than 20G     |
        Temperature Gradient| 15 C/h or less    |  15 C/h or less    |

        * Non-condensing
                                  RELIABILITY DATA

        Mean Time Before Failure (MTBF): 30,000 Hrs.
        Mean Time To Repair (MTTR):         0.5 Hrs.
        Component life:                       5 Years
    
                                  STANDARDS

          UL    APPROVED  E62049-VOL51
          CSA   APPROVED  LR58209
          TUV   APPROVED  R75116
  APPROVED  R5011