Хард диск WD 320GB 7200 16MB SATA II RAID

Performance Specifications
Rotational Speed 7,200 RPM (nominal)
Buffer Size 16 MB
Average Latency 4.20 ms (nominal)

Seek Times
Read Seek Time 8.9 ms
Track-To-Track Seek Time 0.6 ms (average)
Full Stroke Seek 21.0 ms (average)

Transfer Rates
Buffer To Host (Serial ATA) 3 Gb/s (Max)

Physical Specifications
Formatted Capacity 320,072 MB
Capacity 320 GB
Interface SATA 3 Gb/s
User Sectors Per Drive 625,142,448

Physical Dimensions
English
Height 1.028 Inches
Length 5.787 Inches
Width 4.00 Inches
Weight 0.97 Pounds

Metric
Height 25.4 mm
Length 147 mm
Width 101.6 mm
Weight 0.44 kg

Environmental Specifications
Shock
Operating Shock (Read) 65G, 2 ms
Non-operating Shock 350G, 2 ms

Acoustics
Idle Mode 25 dBA (average)
Seek Mode 0 26 dBA (average)
Seek Mode 3 29 dBA (average)

Temperature (English)
Operating 32° F to 140° F
Non-operating -40° F to 158° F

Temperature (Metric)
Operating -0° C to 60° C
Non-operating -40° C to 70° C

Humidity
Operating 5-95% RH non-condensing
Non-operating 5-95% RH non-condensing

Altitude (English)
Operating -1,000 feet to 10,000 feet
Non-operating -1,000 feet to 40,000 feet

Altitude (Metric)
Operating -305M to 3,050M
Non-operating -305M to 12,200M

Vibration
Operating
Linear 20-300 Hz, .75G (0 to peak)
Random 0.004 g?/Hz (10 to 300 Hz)

Non-operating
Low Frequency 0.05 g?/Hz (10 to 300 Hz)
High Frequency 20-500 Hz, 4.0G (0 to peak)

Electrical Specifications
Current Requirements
12 VDC
Read/Write 280 mA
Idle 270 mA
Standby 6 mA
Sleep 6 mA

5 VDC
Read/Write 650 mA
Idle 600 mA
Standby 180 mA
Sleep 180 mA

Power Dissipation
Read/Write 6.60 Watts
Idle 6.20 Watts
Standby 0.97 Watts
Sleep 0.97 Watts