Western Digital Caviar WD2000JD Operation manual

1.5 Gb/s
(Serial ATA 1.0)
3.5-inch/1-inch
40 to 250 GB
WD400JD
WD800JD
WD1200JD
WD1600JD
WD2000JD
WD2500JD
Note: All products may
not be available in all
regions of the world.
Carrying on the heritage of WD Caviar SE hard drives as industry-leading performers, Western
Digital offers WD Caviar SE Serial ATA (SATA) hard drives which feature capacities as large as
250 GB and an 8 MB buffer, to fill acute demand in market segments such as high-end PC,
workstation, and entry-level servers. Designers of enterprise storage systems and servers are
increasingly using desktop-class, large-capacity SATA hard drives because of the advantages
provided by the SATA interface. Benefits include a data transfer rate of 150 MB/s and
improved cabling that enables greater system design flexibility.
Product Benefits
!8 MB cache – fast data transfer from a cache four times larger than the
industry-standard 2 MB size.
!7200 RPM – high-performance rotational speed for high-capacity hard drives.
!Data Lifeguard Tools™– software utility that works in conjunction with the embedded
Data Lifeguard™features (including shock protection, an environmental protection
system, and embedded error detection and repair features)to make hard drive installation,
management, and diagnostics simple and worry-free.
!SecureConnect™– provides a 500 percent stronger cable-to-drive connection than
first-generation SATA hard drives and cables; ensures backward compatibility with legacy
SATA cables and backplanes.
Note: Western Digital's SerialATA cable with SecureConnectis recommendedfor use with
all Western Digital Serial ATA hard drives.
!FlexPower™– connector technology that accepts power from both industry-standard and
new SATA power supplies.
!Point-to-point bus configuration – utilizes the full bandwidth of each drive interface in a
networked environment.
!Hot plug support – allows swapping of hard drives without having to power down the
system or reboot; promotes system design flexibility, data availability, and serviceability.
!Backplane compatibility – promotes expandability and flexibility in system architecture.
The Western Digital Promise
Western Digital understands the importance of the data stored on our hard drives. We are
committed to providing our customers with reliable, high-performance storage products and
superior customer support and services.
7200 RPM

Physical Specifications
40 GB 80 GB 120 GB 160 GB 200 GB 250 GB
Modelnumber WD400JD WD800JD WD1200JD WD1600JD WD2000JD WD2500JD
Interface 1.5 Gb/s 1.5 Gb/s 1.5 Gb/s 1.5 Gb/s 1.5 Gb/s 1.5 Gb/s
(Serial ATA1.0) (Serial ATA 1.0) (Serial ATA 1.0) (Serial ATA 1.0) (Serial ATA 1.0) (Serial ATA 1.0)
Form factor 3.5-inch 3.5-inch 3.5-inch 3.5-inch 3.5-inch 3.5-inch
Formatted capacity140,020 MB 80,026 MB 120,034 MB 160,041 MB 200,049 MB 250,059 MB
User sectors per drive 78,165,360 156,301,488 234,441,648 312,581,808 390,721,968 488,397,168
Bytes per sector (STD) 512 512 512 512 512 512
Dedicatedlanding zone Yes Yes Yes Yes Yes Yes
Actuator latch/auto park Yes Yes Yes Yes Yes Yes
Warranty23-year 3-year 3-year 3-year 3-year 3-year
For service and literature:
support.wdc.com
www.westerndigital.com
WesternDigital, the Western Digitallogo,and
WD Caviar are registered trademarks, and
Data Lifeguard, Data Lifeguard Tools,
SecureConnect, FlexPower, and
FIT Lab are trademarks of Western Digital
Technologies, Inc. Other marks may be
mentioned herein that belong to other
companies. Product specifications subject to
change withoutnotice.
©2004 Western Digital Technologies, Inc.
All rights reserved.
Western Digital
20511 Lake Forest Drive
Lake Forest, California 92630 U.S.A.
2879-001081-003 02/04
800.ASK.4WDC U.S.A.
+31.20.4467651 Europe
Performance Specifications
Read seek 8.9 ms (average)
Data Transfer Rate
-Buffer to host3150 MB/s
-Buffer to disk 748 Mbits/s max
Track-to-track seek42.0 ms (average)
Full stroke read seek421ms (average)
Average latency 4.2 ms
Rotational speed 7200 RPM
Read cache Adaptive
Write cache Yes
Buffer 8 MB
Drive ready time 9.0 sec average
Start/stopcycles 50,000min
LBA support Yes
Error rate
(non-recoverable) <1 in 1014 bits read
1 Western Digital defines a megabyte (MB) as 1,000,000 bytes and a gigabyte (GB) as 1,000,000,000 bytes. Someoperating systems use
the binary numbering system which results in a lower reported capacity.
2 Three-year standard warranty on bulk WD Caviar SE Serial ATA hard drives. This standard warranty may be subject to variations
imposed by local law or regulations.
3 Effective maximum transfer rate running Serial ATA 1.0.
4 On reads and writes.