HP Model 712/100 hp 9000 series 700 model 712 technical reference manual (a261 - Page 54

HP A4068A 3.5-in. Flexible Disk Drive(PC Interface), Table 4-2. Flexible Drive Specifications - model 712 100

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HP A4068A 3.5-in. Flexible Disk Drive(PC Interface) Capacity and Performance Table 4-2. Flexible Drive Specifications Feature Data Capacity: Unformatted: Formatted Internal Data Buffer: Data Transfer Rate: Off Media: Disk Performance: Rotational Speed: Start Time: Ave. Latency: Media Specification: Density: Sides: Cylinders: Track Construction: Tracks per Side: Tracks per Disk: Density: Inner Bit Density: Positioning Error: Access Times: Track-to-track: Seek settling time: Index Detection: Detection Cycle: Timing Error: Window Margin: Low Density 1.0 MB 720KB @ 9 sectors/track 31KB 250 Kbits/sec 300 rpm ±2% 500 msec. max. 100 msec. 2S/DD 2 80 80 160 135 tpi 8,717 bpi < ±15 um 3 msec. max. 15 msec. max 1 per rev. 200 msec ±1.5% ±500 usec. 600 nsec. min. High Density 2.0 MB 1.474 MB @18 sectors/track 31 KB 500 Kbits/sec 300 rpm ±2% 500 msec. max. 100 msec. 2S/HD 2 80 80 160 135 tpi 17,434 bpi < ±15 um 3 msec. max. 15 msec. max. 1 per rev. 200 msec ±1.5% ±500 usec. 300 nsec. min. High Density 1.6 MB 1.228 MB @ 15 sectors/track 31 KB 500 Kbits/sec 360 rpm ±2% 480 msec. max. 83.3 msec. 2S/HD 2 80 80 160 135 tpi 14,528 bpi < ±15 um 3 msec. max. 15 msec. max. 1 per rev. 166.7 msec ±1.5% ±500 usec. 300 nsec. min. Environmental Requirements Temperature Operating: Non-operating: Altitude Operating: Non-operating: 4 to 50 deg. C (39 to 122 deg. F) 20 deg. C/hr (27 deg. F/hr gradient) -22 to 60 deg. C (-8 to 140 deg. F) 30 deg. C/hr (54 deg. F/hr gradient) Less than 5,000 meters (16,500 feet) Less than 12,000 meters (40,000 feet) 4-6 Int. Mass Storage Model 712 Technical Reference

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4-6
Model 712 Technical Reference
Int. Mass Storage
HP
A4068A 3.5–in. Flexible Disk Drive(PC Interface)
Capacity and Performance
Table 4-2. Flexible Drive Specifications
Feature
Low Density
High Density
High Density
Data Capacity:
Unformatted:
Formatted
Internal Data Buffer:
1.0 MB
720KB
@ 9 sectors/track
31KB
2.0 MB
1.474 MB
@18 sectors/track
31 KB
1.6 MB
1.228 MB
@ 15 sectors/track
31 KB
Data Transfer Rate:
Off Media:
250 Kbits/sec
500 Kbits/sec
500 Kbits/sec
Disk Performance:
Rotational Speed:
Start Time:
Ave. Latency:
300 rpm
±
2%
500 msec. max.
100 msec.
300 rpm
±
2%
500 msec. max.
100 msec.
360 rpm
±
2%
480 msec. max.
83.3 msec.
Media Specification:
Density:
Sides:
Cylinders:
2S/DD
2
80
2S/HD
2
80
2S/HD
2
80
Track Construction:
Tracks per Side:
Tracks per Disk:
Density:
Inner Bit Density:
Positioning Error:
80
160
135 tpi
8,717 bpi
<
±
15 um
80
160
135 tpi
17,434 bpi
<
±
15 um
80
160
135 tpi
14,528 bpi
<
±
15 um
Access T
imes:
Track–to–track:
Seek settling time:
3 msec. max.
15 msec. max
3 msec. max.
15 msec. max.
3 msec. max.
15 msec. max.
Index Detection:
Detection Cycle:
Timing Error:
1 per rev.
200 msec
±
1.5%
±
500 usec.
1 per rev.
200 msec
±
1.5%
±
500 usec.
1 per rev.
166.7 msec
±
1.5%
±
500 usec.
Window Margin:
600 nsec. min.
300 nsec. min.
300 nsec. min.
Environmental Requirements
Temperature
Operating:
4 to 50 deg. C (39 to 122 deg. F)
20 deg. C/hr (27 deg. F/hr gradient)
Non-operating:
-22 to 60 deg. C (-8 to 140 deg. F)
30 deg. C/hr (54 deg. F/hr gradient)
Altitude
Operating:
Less than 5,000 meters (16,500 feet)
Non-operating:
Less than 12,000 meters (40,000 feet)