Specifications

Mechanical Dimensions
Width
= 8.55 in (217 mm)
Height
= 2.31 in (59 mm)
Depth
= 12.00 in (305 mm)
Weight
= 7lbs (3 kg)
Mounting
Top loading
Diskette Horizontal Label
Up/Down
Diskette Vertical Label Left/Right
Power Dissipation:
10 watts (34 BTU/hr) Standby
28 watts (96 BTU/hr) Typical
50 watts (171 BTU/hr) Maximum
1.2.4 Reliability Specifications
Mean Time Between Failure: 10,000 Power On Hours under typical usage.
Preventive Maintenance: Not required.
Mean Time to Repair:
30 Minutes
Component Life: 5 years
Error Rates:
Soft Read Errors:
Hard Read Errors:
Seek Errors:
Media Life:
1
per 10
9
bits read
1
per 10
12
bits read
1 per
10
6
seeks
Passes per Track: 3.5 x 10
6
Insertions: 30,000 +
1.3 FUNCTIONAL CHARACTERISTICS
The 810/860 floppy disk drives consist of:
a. Read/Write
and Control Electronics
b. Drive Mechanism
c.
Precision Track Positioning Mechanism
d. Read/Write
Head (s)
1.3.1 Electronics
The electronics are packaged on one PCB which contains:
a. Index Detector Circuits (Sector/Index for Hard Sectored Media)
b.
Head Position Actuator Driver
c. Read/Write Amplifier
and Transition Detector
d. Write
Protect
e. Drive Select Circuits
f. Spindle Motor Control
g.
Data/Clock Separation Circuits (FM Only)
h. Drive Ready Detector Circuit
i. Drive True Ready Detector Circuit
j. Side Select Circuit (Used on SA860 only)
k. In Use and Door Lock Circuits
1. Internal and External Write Current Switching
m.
Power On Reset Circuit
n. Activity LED
1-3