20 Meg Hard Disk Card (250-1029) Specifications Faxback Doc. # 3000 CAPACITY: 21.3 MB formatted TRANSFER RATE: 5 megabits per sec. CYLINDERS: 615 HEADS: 4 TRACKS PER INCH: 753 DISKS: 2 AVERAGE ACCESS: 85 Ms FORMAT: MFM ROTATIONAL SPEED: 3550 rpm OP. TEMPERATURE: 59 deg F to 91 deg F BYTES PER SECTOR: 512 SECTORS PER TRACK: 17 MTBF: 20,000 hours DRIVE DESIGN LIFE: 5 years MAX. CURRENT: 1.7A @ 5VDC TYPICAL CURRENT: 1.7A @ 5VDC 2.0A @ 12VDC TYPICAL POWER: 16.9 watts VOLTAGE: +5VDC,+12VDC TOLERANCE: +5%, -5%