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Orchestrating a brigher world

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  5. D3725-351 Hard Drive

D3725-351 Hard Drive

Capacity Formatted: 730 MB
Per Disk: 365 MB
Configuration Information
CMOS Setup Cylinders = 1,416
Heads = 16
Sectors/track = 63
Landing zone = automatic
Write precompensation = automatic
Switches SW1-1 = "on" (for master; "off" for slave)
SW1-2 = "off" (cable select disable)
SW1-3 = "off" (factory use only)
SW1-4 = "off" (factory use only)
Dimensions
Height 1.0 in/25.4 mm
Width 4.0 in/101.6 mm
Depth 5.74 in/146 mm
Weight 1.25 lb/0.6 KG
Disk Configuration
Start/Stop Time 15 ms
Disk Size 3.5"
Disks 2
Data Heads 4
Data Surfaces 4
Tracks/Surface 3,493
Track Density 3,800 tpi
Bit Density 71,000 bpi
Record Method 1-7 RLL
Rotational Rate 4,090 RPM
Environmental
Temperature Operating = 5° to 55° C
Non-operating = -40° to 60° C
Humidity Operating = 8% to 80%
Non-operating = 8% to 90%
Thermal Grad 20° C/Hr max
Shock Operating = 5 G (1/2 sine, 11 ms)
Non-Operating = 75 G (1/2 sine, 11 ms)
Vibration swept sine, 1 octave/minute
Oper = 0.5 G @ 5-100 Hz
Non-op = 5 G @ 5-100 Hz
Performance Specifications
Seek Times Average = 11 ms
Track to track = 3 ms
Maximum = 23 ms
Latency, Avg 7.3 ms
Cache Memory Read = 256 KB
Write = 128 KB
Interface IDE
Data Transfer To/from media = 6.0 MB/sec
To/from buffer:
PIO mode 4 burst to 16.6 MB/s
DMA mode 2 burst to 16.6 MB/s
Power
Voltage Required +5V/+12V
Power Dissipation Read/write/seek = 3.6 watts Sleep mode = 1.8 watts
Reliability
MTBF 300,000 POH
MTTR < 30 minutes
Error Rate Recoverable = <1 per 10-10th bits Un-recoverable = <1 per 10-13th bits Seek = <1 per 10-7th bits