HDD Western Digital Caviar WD205BA, 20.5GB, 5400 rpm, Ultra ATA/66 IDE, 2MB buffer (жесткий диск)

WD Caviar® WD205BA

Recommended Setup Parameters
Cylinders*	16383
Heads	16
Sectors/Track	63
Landing Zone	16383
WPC	16383
Jumper Setting Information	Nine Pin or Ten Pin Drive**

Physical Specifications
Formatted Capacity*	20,525 MB
Interface	40-pin EIDE
Actuator Type	Rotary Voice Coil
Number of Platters	3
Data Surfaces	6
Number of Heads	6
Bytes Per Sector	512
User Sectors Per Drive	40,088,160
Servo Type	Embedded
Recording Method	Rate 16/17 PRML
ECC	Reed Solomon
Head Park**	Automatic

* Western Digital defines a megabyte (MB) as 1,000,000 bytes and a gigabyte (GB) as 1,000,000,000 bytes

** Turning the system power off causes the WD Caviar® to perform an automatic head park operation.

Performance Specifications
Average Seek (Read)	9 ms (typical) 9.5 ms (maximum)
Average Seek (Write)	9.5 ms (typical) 10.5 ms (maximum)
Track to Track Seek	2.2 ms (typical) 2.9 ms (maximum)
Full Stroke Seek (Read)	15.5 ms typical, 18 ms maximum
Index Pulse Period	8.33 (nominal)
Average Latency	4.17 ms (nominal)
Rotational Speed	7200 RPM (nominal)
Transfer Rate (Buffer to Host)	66.6 MB/s (Mode 4 Ultra ATA) 33.3 MB/s (Mode 2 Ultra ATA) 16.6 MB/s (Mode 4 PIO) 16.6 MB/s (Mode 2 multi-word DMA)
Transfer Rate (Buffer to Disk)	184 Mbits/s minimum 284 Mbits/s maximum
Interleave	1:1
Buffer Size	2 MB
Error Rate (Non-Recoverable)	<1 in 1013 bits read
Spindle Start Time - From Power-on to Drive Ready*	18s typical, 31s maximum
Contact Start/Stop Cycles (CSS)	40,000 minimum

* Defined as the time from power-on to the setting of the Drive Ready and Seek Complete including calibration.

Physical Dimensions
Height	English: 1.00 inch (±0.02 inch) Metric: 25.4 mm (±0.40 mm)
Length	English: 5.75 inches (±0.02 inch) Metric: 146.05 mm (±0.60 mm)
Width	English: 4.00 inches (±0.02 inch) Metric: 101.6 mm (±0.40 mm)
Weight (min)	English: 1.23 pounds Metric: 0.56 kg
Weight (max)	English: 1.38 pounds Metric: 0.63 kg

Electrical Specifications
Current Requirements and Power Dissipation
Operating Mode	RMS Current*		Power, Typical*
	12 VDC	5 VDC
Spinup	2.0 A max	0.7 A	27.5 W max
Read/Write/Idle	0.6 A	0.3 A	9.9 W
Seek	0.6 A	0.3 A	10.1 W

Power Management Commands
Operating Mode	RMS Current*		Power, Typical*
	12 VDC	5 VDC
Idle (E1H)	0.4 A	0.3 A	6.9 W
Standby (E0H)	9 mA	0.1 A	0.8 W
Sleep (E6H)	7 mA	52 mA	0.4 W

Input Voltage Requirements

+5.0V (±5%) and 12.0V (±8%)

Ripple
	+12 VDC	+5 VDC
Maximum Frequency	150 mV (double amplitude) 0-10 MHz	100 mV (double amplitude) 0-10 MHz

Power Connectors and Cables
Power Connector	4-pin AMP (P/N 84069-1 or equivalent)
Mating Connector	Body (AMP 1-480424-0 or equivalent) Pins (AMP 60619-4 or equivalent)
Power Cable Wire Gauge	18 AWG (or heavier)

* All values are typical (25°C, 5.0V, and 12V input) except where specified as maximum.

Note: Current measurements cut off frequency at 1 kHz.

Environmental Specifications
Shock:*	Operating 10 G (2 per minute maximum, half sine wave 11 ms) 65 G (2 per minute maximum, half sine wave 2 ms) Non-operating 75 G (3 drops per axis maximum, half sine wave 11 ms) 175 G (3 drops per axis maximum, half sine wave 2 ms)
Vibration	Operating 5-300 Hz, 0.5 G (0 to peak) Non-operating 5-500 Hz, 2.0 G (0 to peak) Sweep Rate One-half octave/minute
Rotational Shock	Amplitude 18K rad/sec2 Duration 2 ms
Operating Temperature and Humidity	Temperature 5ºC to 55ºC (41ºF to 131ºF) Humidity 8-90% RH non-condensing 29.4ºC (maximum wet bulb) Thermal Gradient 15°C/hour (maximum)
Non-Operating Temperature and Humidity	Temperature -40ºC to 65ºC (-40ºF to 149ºF) Humidity 5-95% RH non-condensing 35ºC (maximum wet bulb) Thermal Gradient 15°C/hour (maximum)
Altitude	Operating -1000 feet to 10,000 feet (-305M to 3,050M) Non-Operating -1000 feet to 40,000 feet (-305M to 12,200M)
Acoustics	Idle Mode** 38 dBA (average) 42 dBA (maximum) Seek Mode*** 45 dBA (average) 48 dBA (maximum)
Reliability	AFR <1% MTBF 750,000 Power On Hours Component Design Life 5 years Warranty Period 3 years

* Half sine wave, measured without shock isolation and without non-recoverable errors.

** No audible pure tones.

*** Random seek at a rate of 26 seeks per second.