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 capacity
1
160,041 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 compliant
2
Yes
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.
2
WD 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.
3
Effective maximum SATA 3 Gb/s transfer rate.
4
Maximum drive capacity model.
5
After 24 power-on hours.
6
No non-recoverable errors during operating test or after non-operating tests.
7
20 KHz cutoff.
8
Sound power level.
WD RE2
Enterprise Hard Drives
Environmental Specification
6
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 g
2
/Hz (10 to 300 Hz)
0.008 g
2
/Hz (300 to 500 Hz)
Linear
20–300 Hz, 0.75G (0 to peak)
Non-operating
Random
0.05 g
2
/
Hz (10 to 300 Hz)
0.01 g
2
/
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
7
28 dBA
Performance seek mode
8
34 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 host
3
3 Gb/s (maximum)
Buffer to disk
4
98 MB/s (sustained)
Drive ready time
12.0 sec (average)
Error rate
(non-recoverable)
<1 in 10
15
bits read
LBA support
Yes
MTBF
5
1,200,000 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%
1
2
