Western Digital - WD2500JD 250 GB Hard Disk Drive
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Specifications
Rotational Speed 7,200 RPM (nominal)
Buffer Size 8 MB
Average Latency 4.20 ms (nominal)
Contact Start/Stop Cycles 50,000 minimum
Seek Times (Average)
Read Seek Time (Average) 8.9 ms
Write Seek Time (Average) 10.9 ms (average)
Track-To-Track Seek Time 2.0 ms (average)
Full Stroke Seek 21.0 ms (average)
Transfer Rates
Buffer To Host (SATA) 1,200 Mbits/s (Max)
Buffer To Disk 748 Mbits/s (Max)
Number of Heads (Physical) 6
Formatted Capacity 250,059 MB
Capacity 250 GB
Interface SATA
Actuator Type Rotary Voice Coil
Number of Platters 3
Bytes Per Sector 512
User Sectors Per Drive 488,397,168
Servo Type Embedded
Height (English) 1.028 Inches (Max)
Length (English) 5.787 Inches (Max)
Width (English) 4.00 Inches (+/- 0.010 inch)
Weight (English) 1.60 Pounds (+/- 0.14 pounds)
Metric
Height (Metric) 25.4 mm (Max)
Length (Metric) 147 mm (Max)
Width (Metric) 101.6 mm
Weight (Metric) 0.73 kg (+/- 10%)
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