Performance
Part number 5500624,5500962,5501570,5501719

High density modeNormal density mode
Capacity (in bytes)2 Megabyte (MB) mode 1.6 MB mode 1.0 MB mode
Unformatted (MFM)
  • Per disk
    		• 2.0 MB 1.667 MB 1.0 MB
  • Per surface
    		•  1.0 MB 833,000 MB 500,000 MB
  • Per track
    		•  12.500 MB 10.413 MB 6,250 MB
    Formatted (MFM)18 sectors/track15 sectors/track9 sectors/track
  • Per disk
    		• 1,474,5601,228.800737,280
  • Per surface
    		• 737,280614,400368,640
  • Per track
    		• 9,2167,6804,608
  • Per sector
    		• 512512512
    Transfer Rate (MFM)500 Kilobits per second (Kbps)500 Kbps250 Kbps
    Access time
    Track to track3 ms3 ms3 ms
    Settling time15 ms15 ms15 ms
    Average79 ms79 ms79 ms
    Latency (avg.)100 ms83 ms100 ms
    Turn Around Delay (min.)18 ms18 ms18 ms

    Note: This drive is capable of operating as a mode 2 or mode 3 drive. The only real difference is that in mode 3 the drive is capable (through software) of spinning up to 360 rpm to read the 1.6 MB format. This format is currently only being used in Japan as of September 1996.