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DSE2550A Harddrive
Capacity Formatted: 2,550 MB
Per Disk: 850 MB
Configuration Information
CMOS Setup Cylinders = 4,960
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/146mm
Weight 1.25 lb/0.6 KG
Disk Configuration
Disk Size 3.5"
Disks 3
Data Heads 6
Data Surfaces 6
Tracks/Surface 5,045
Track Density 5,350 tpi
Bit Density 111,000 bpi
Record Method PRML (8-9 Code)
Rotational Rate 5,200 RPM
Start/Stop Time 15 sec typical
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
Wet Bulb, Max 29° C
Shock Operating: 5 G (1/2 sine, 11 ms)
Non-operating: 75 G (1/2 sine, 11 ms)
Vibration Oper: 0.5 G @ 5-100 Hz
Non-operating: 5 G @ 5-100 Hz
Performance Specifications
Seek Times Average = 11 ms
Track to track = 3 ms
Maximum = 22 ms
Latency, Avg 5.77 s
Cache Memory Read = 128 KB
Write = 128 KB
Interface IDE
Data Transfer To/from media = 12.6 MB/s
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 Ready mode = 5 watts Sleep mode = 2.5 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
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