Enterprise
Hard Drives
For service and literature:
support.wdc.com
www.westerndigital.com
Western Digital and WD Raptor are
registered trademarks; and WD, the WD
logo, FIT Lab, FlexPower, 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.
© 2006 Western Digital Technologies, Inc.
All rights reserved.
Western Digital
20511 Lake Forest Drive
Lake Forest, California 92630
U.S.A.
2879-001165-A02 Aug 2007
800.
ASK.4WDC
North America
949.672.7199
Spanish
+800.6008.6008
Asia Pacific
+31.20.4467651
EMEA
Drive Specifications
Performance Specifications
1
1 gigabyte (GB)=1 billion bytes. One terabyte (TB) = one trillion bytes. Total accessible capacity
varies depending on operating environment.
2
WD complies with the Reduction of Hazardous Substances (RoHS) Directive 2002/95/EC of the
European Parliament, which is effective in the EU beginning July 1, 2006. RoHS 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
Maximum burst rate running the specified SATA transfer mode.
4
Five-year limited warranty unless otherwise required by law. For extended warranty information,
visit our Web site at support.wdc.com.
36 GB
74 GB
150 GB
Formatted capacity
1
37,019 MB
74,356 MB
150,039 MB
User sectors per drive
72,303,840
145,226,112
293,046,768
WD model number
WD360ADFD
WD740ADFD
WD1500ADFD
SATA latching connector
Yes
Bytes per sector (STD)
512
Form factor
3.5-inch
Interface
SATA 1.5 Gb/s
RoHS compliant
2
Yes
Average latency
2.99 ms
Buffer
16 MB
Cache
Read
Adaptive
Write
Yes
Data transfer rate (buffer to host)
1.5 Gb/s (maximum)
3
Drive ready time
7.0 sec (average), 10.0 sec (maximum)
Error rate (non-recoverable)
<1 in 10
15
bits read
LBA support
Yes
MTBF
1,200,000 hours
Rotational speed
10,000 RPM
Seek time
Read
4.6 ms (average)
Write
5.2 ms (average)
Track-to-track seek
Read
0.3 ms (average), 0.6 (maximum)
Write
0.4 ms (average), 0.75 (maximum)
Start/stop cycles
20,000 minimum
Limited warranty
4
5-year
WD Raptor
Enterprise Hard Drives
