FD1157C - 1.2MB, 5.25 Inch

Capacity:	Formatted: High density mode = 1.2MB Normal density mode = 720kb Unformatted: High density mode = 1.6MB Normal density mode = 1.0MB
Dimensions
Height:	1.6 in/41 mm
Width:	5.7 in/146 mm
Depth:	8.0 in/203 mm
Weight:	2.6 lb/1.2 kg
Disk Configuration
Disk Size:	5.25"
Data Heads:	2
Data Surfaces:	2
Tracks/Surface:	High density mode = 80 Normal density mode = 80
Track Density:	96 tpi
Bit Density:	High density mode = 9,870 bpi Normal density mode = 5,922 bpi
Record Method:	MFM
Rotational Rate:	High density mode = 360 RPM Normal density mode = 300 RPM
Environmental
Shock:	Operating = 10G Non-operating = 30G
Vibration:	Operating = 0.5G @ 0-100Hz Non-operating = 3G @ 0-100Hz
Performance Specifications
Seek Times:	Track to track = 3ms
Settle Time:	15ms
Data Transfer:	High density mode = 500kb/s Normal density mode = 250kb/s
Power
Voltage Req'd:	+5V, +12V
Pwr Dissipation:	Read/write mode = 4.8 watts
Reliability
MTBF:	12,000 POH
MTTR:	<15 minutes