NEC POWERMATE P60D Service Manual page 180

B-4 Specification
DISKETTE DRIVE SPECIFICATIONS
Table B-4 lists the specifications for the diskette drives.
Table Appendix B -4 Specifications for Diskette Drives
Features
Storage Capacity
Unformatted
Formatted
Recording Density
Bit density
Track density
Number of Cylinders
Number of Tracks
Recording Method
Disk Speed
Data Transfer Rate
Access Time
Average seek
Minimum seek
Head load
Dimensions
Height
Width
Depth
Weight
Operating Temperature
Relative Humidity
Tolerance Range
Power
+12 Vdc
+5 Vdc
Power Consumption
Error Rate
Recoverable
Non-recoverable
Seeks
Mean Time Between
Failures
OSDA-90C 1.44-MB
2.0 MB
1.44 MB
17,434 bpi
135 tpi
80
160 (80 tracks x 2 sides)
MFM
300 rpm
500/250k bps
94 ms
3 ms
Non-head load
1.0 in. (25.4 mm)
4.9 in. (101.6 mm)
5.9 in. (150 mm)
1.0 lb (0.63 kg)
41° to 113°F (5° to 45°C)
20% to 80%
Not Used
0.87 A (start up)
1.5 W (operating)
-9
1 per 10
-12
1 per 10
-6
1 per 10
12,000 hours
FD1158C 1.2 MB
1.67 MB
1.2 MB
9870 bpi max
96 tpi
80
160 (80 tracks x 2 sides)
MFM/FM
360 rpm
500/250k bps
94 ms
3 ms
35 ms max
1.0 in. (25.4 mm)
5.7 in. (146 mm)
7.4 in. (190 mm)
1.5 lb (0.67 kg)
39° to 115°F (4° to 46°C)
20% to 80%
1.19 A (start up)
0.09 A (start up)
2.6 W (operating)
-9
1 per 10
-12
1 per 10
-6
1 per 10
12,000 hours