DISK DRIVE SPECIFICATIONS

     MODEL M2261E                    Part Number B03B-4945-B401A

        INTERFACE ESDI               RECORDING CODE 1/7 RLL       

        CAPACITY----Unformatted 415.1 Mb.   Formatted 326.9 Mb.
                    Per Track   217.0 Kb.   Sectors/track 53 @ 512B/S  

        NUMBER OF---Heads  8                      Servo Tracks 1          
                    Cylinders 1658             

        POSITIONING TIME 
                    Track to track   4 mS. Average  16 mS.
                    Maximum         30 mS. 

        POSITIONING METHOD  Rotary voice coil motor                      

        SPINDLE SPEED  3600 R.P.M.           AVERAGE LATENCY  8.3 mS.

        DENSITY---Recording 28816 B.P.I.     Track 1712 T.P.I.
                  
        DATA TRANSFER RATE        1.875 Mbytes/Sec.

        START TIME  20 Secs.            STOP TIME  15 Secs.

        ERROR RATES   Recoverable       10 per 10**11      
                      Non-recoverable   10 per 10**13      
                      Seek              10 per 10**7       


                              PHYSICAL SPECIFICATIONS

        DIMENSIONS.  5.7in X 3.3in X 8.0in(WHD)      WEIGHT. 7.7lb       

        POWER REQUIREMENTS.  +5V @ 1.6A, +12V @ 1.65A, 5.0A(Peak)         
                     Consumption. 30 Watts.

                                OPERATING          NON-OPERATING     
        Temperature  - - - -|    5 to 45 C      |  -40 to 60 C       |
        Humidity - - - - - -|   20 to 80%RH     |    5 to 95%RH      |
        Altitude - - - - - -|    0 to 3000m     |    0 to 12000m     |
        Vibration  - - - - -| less than 0.2G    | less than 0.4G     |
        Shock  - - - - - - -| less than 2.0G    | less than 20G      |
        Temperature Gradient|    15deg/hr       |                    |

                                  RELIABILITY DATA

             Mean time before failure      200,000 Hrs.
             Mean time to repair               0.5 Hrs.
             Component life                      5 Yrs.
    
                                   STANDARDS

          UL File E62049                                             
          CSA LR 51352-34                                            
          TUV Licence R75116