ST - 506

       UNFORMATTED CAPACITY (MB) ________________6.38
       FORMATTED CAPACITY (32 SECTORS) (MB) _____5.0
       ACTUATOR TYPE ____________________________STEPPER
       TRACKS ___________________________________612
       CYLINDERS ________________________________153
       HEADS ____________________________________4
       DISCS ____________________________________2
       MEDIA TYPE _______________________________OXIDE
       RECORDING METHOD _________________________MFM
       TRANSFER RATE (mbits/sec) ________________5.0
       INTERFACE ________________________________ST506
       TPI (TRACKS PER INCH) ____________________255
       BPI (BITS PER INCH) ______________________7,690
       AVERAGE ACCESS (ms) ______________________85
       SINGLE TRACK SEEK (ms) ___________________3
       MTBF (power-on hours) ____________________11,000
       POWER REQUIREMENTS: +12V START-UP (amps) _3.5
                           +12V TYPICAL (amps) __1.6
                           +5V TYPICAL (amps) ___0.7
                           TYPICAL (watts) ______22.7
                           MAXIMUM (watts) ______47.0
       BUFFERED STEP PULSE RATE (micro sec) _____3 ms ONLY
       WRITE PRECOMP (cyl) ______________________128
       REDUCED WRITE CURRENT (cyl) ______________128
       LANDING ZONE (cyl)________________________157
       IBM AT DRIVE TYPE ________________________N/A