HP Portable 486 Compaq Portable 486c Personal Computer Maintenance and Service - Page 5

Diskette Drive, Fixed Disk Drives, Sectors Per Track

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NOTE: These values are maximum values based on nominal operating conditions for temperature, line voltage, frequency, and altitude * 60W maximum available through EISA expansion slots Chapter 1.5 Diskette Drive 1.44 MB Diskette Size 3 1/2 inch Capacity Per Diskette (high/low) 1.44 MB/720 KB LED Indicators Read/Write (high density) Read/Write (low density) Green Orange Drives Supported One Drive Height 0.75 inch (1.9 cm) Drive Rotation (rpm) 300 Transfer Rate (bps) (high/low) 500K/250K Bytes Per Sector 512 Sectors Per Track (high/low) 18/9 Tracks Per Side (high/low) 80/80 Access Times Track to Track Average Settling Time Latency Average 3 ms 80 ms 15 ms 100 ms Cylinders (high/low) 80/80 Read/Write Heads 2 Chapter 1.6 Fixed Disk Drives 210 MB 120 MB Standard Configurations Model 210 Model 120 Formatted Capacity 212.6 MB 121.5 MB

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NOTE: These values are maximum values based on nominal operating conditions
for temperature, line voltage, frequency, and altitude.
-----------------------------------------------------------------------------
* 60W maximum available through EISA expansion slots.
=============================================================================
Chapter 1.5 Diskette Drive
=============================================================================
1.44 MB
-----------------------------------------------------------------------------
Diskette Size
3 1/2 inch
Capacity Per Diskette
(high/low)
1.44 MB/720 KB
LED Indicators
Read/Write (high density)
Green
Read/Write (low density)
Orange
Drives Supported
One
Drive Height
0.75 inch (1.9 cm)
Drive Rotation (rpm)
300
Transfer Rate (bps)
(high/low)
500K/250K
Bytes Per Sector
512
Sectors Per Track
(high/low)
18/9
Tracks Per Side
(high/low)
80/80
Access Times
Track to Track
3 ms
Average
80 ms
Settling Time
15 ms
Latency Average
100 ms
Cylinders (high/low)
80/80
Read/Write Heads
2
=============================================================================
Chapter 1.6 Fixed Disk Drives
=============================================================================
210 MB
120 MB
-----------------------------------------------------------------------------
Standard Configurations
Model 210
Model 120
Formatted Capacity
212.6 MB
121.5 MB