
Enterprise Hard Drives
For service and literature:
support.wdc.com
www.westerndigital.com
Western Digital, WD, and the WD logo are
registered trademarks in the U.S. and other
countries; and the FIT Lab logo and RAFF are
trademarks of Western Digital Technologies,
Inc. Other marks may be mentioned herein
that belong to other companies. Product
specifications subject to change without
notice.
© 2008 Western Digital Technologies, Inc.
All rights reserved.
Western Digital
20511 Lake Forest Drive
Lake Forest, California 92630
U.S.A
2879-701176-A11 Jun 2008
800.ASK.4WDC North America
949.672.7199 Spanish
+800.6008.6008 Asia Pacific
+31.20.4467651 EMEA
Drive Specifications
160 GB 320 GB 400 GB 500 GB 750 GB
Formatted capacity1160,041 MB 320,072 MB 400,088 MB 500,107 MB 750,156 MB
User sectors per drive 312,581,808 625,142,448 781,422,768 976,773,168 1,465,149,168
Model number WD1601ABYS WD3201ABYS WD4000ABYS WD5000ABYS WD7500AYYS
WD4001ABYS WD5001ABYS
Actuator latch/auto park Yes Yes Yes Yes Yes
Bytes per sector (STD) 512 512 512 512 512
Dedicated landing zone Yes Yes Yes Yes Yes
Form factor 3.5-inch 3.5-inch 3.5-inch 3.5-inch 3.5-inch
Interface SATA 3 Gb/s SATA 3 Gb/s SATA 3 Gb/s SATA 3 Gb/s SATA 3 Gb/s
Native Command
Queuing Yes Yes Yes Yes Yes
RoHS compliant2Yes Yes Yes Yes Yes
1 One gigabyte (GB) = one billion bytes. One terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment.
2WD products manufactured and sold worldwide after August 1, 2005, meet or exceed Restriction of Hazardous Substances (RoHS) compliance requirements as
mandated by the European Union for electrical and electronic products. The RoHS Directive 2002/95/EC of the European Parliament, which is effective in the EU
beginning July 1, 2006, aims to protect human health and the environment by restricting the use of certain hazardous substances in new equipment, and consists of
restrictions on lead, mercury, cadmium, and other substances.
3Effective maximum SATA 3 Gb/s transfer rate.
4Maximum drive capacity model.
5After 24 power-on hours.
6No non-recoverable errors during operating test or after non-operating tests.
720 KHz cutoff.
8Sound power level.
WD RE2
Enterprise Hard Drives
Environmental Specification6
Shock
Note: Half-sine wave, measured in 2 ms duration and without
isolation.
Vibration
Operating Temperature and Humidity
Non-Operating Temperature and Humidity
Acoustics (Average) 4
Operating (2 ms) 30G (write), 65G (read)
Non-operating (1 ms) 250G
Operating
Random 0.004 g2
/Hz (10 to 300 Hz)
0.008 g2
/Hz (300 to 500 Hz)
Linear 20–300 Hz, 0.75G (0 to peak)
Non-operating
Random 0.05 g2
/Hz (10 to 300 Hz)
0.01 g2
/Hz (300 to 500 Hz)
Linear 20–500 Hz, 4.0G (0 to peak)
Temperature 5°C to 55°C
Humidity 5–95% RH non-condensing
Thermal gradient 20°C/hour (maximum)
Temperature –40°C to 65°C
Humidity 5–95% RH non-condensing
Thermal gradient 30°C/hour
Idle mode 728 dBA
Performance seek mode834 dBA
Quiet seek mode 30 dBA
Performance Specifications
Physical Dimensions
Average latency 4.2 ms
Buffer 16 MB
Cache
Read Adaptive
Write Yes
Data transfer rate
Buffer to host33 Gb/s (maximum)
Buffer to disk498 MB/s (sustained)
Drive ready time 12.0 sec (average)
Error rate
(non-recoverable) <1 in 1015 bits read
LBA support Yes
MTBF51,200,000 hours
Rotational speed 7200 RPM
Seek time
Full stroke 21 ms (average)
Read 8.9 ms (average)
Track-to-Track 0.6 ms (average)
Limited warranty 5-year
Height 1.028 in (25.4 mm)
Length 5.787 in (147.0 mm)
Width 4.0 in (101.6 mm) ±0.01 in
Weight 4 1.61 lb (0.73 kg) ±10%