DSE2550A Hard Drive

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