Western Digital Raptor WD1500ADFD User manual

Enterprise Hard Drives
•Lightning Fast – 10,000 RPM spin speed, 4.6 ms average
read seek time, and 16 MB cache for superlative performance.
•Unrivaled Reliability – 1.2 million hours MTBF at 24x7 100%
duty cycle, make this the world’s most reliable SATA drive.
•Enterprise-class SATA – World's fastest SATA drive random
I/O performance beats SCSI in most benchmarks.
Built for enterprise environments to match SCSI reliability and
performance, WD Raptor 10,000 RPM SATA hard drives provide
simplified connectivity at significantly less cost than parallel SCSI
drives. With up to 150 GB capacity, 16 MB cache, NCQ and Rotary
Acceleration Feed Forward (RAFF™) for state-of-the-art vibration
tolerance, WD Raptor offers the best combination of reliability,
high capacity, and performance for enterprise applications. Ideal for
servers, network attached storage, scientific computing, video
surveillance, enterprise backup and digital video.
WD Raptor
SATA Hard Drives
1.2 Million Hours MTBF
World’s Fastest SATA Drive
5-year Limited Warranty
®
World’s fastest and most
reliable SATA drive.
"Enterprise Disk Drives" Company of the Year
VARBusiness ARC 2006

Enterprise Hard Drives
WD Raptor
SATA Hard Drives
Western Digital, WD, the WD logo, Put Your Life On It, and WD Raptor are registered trademarks; and RAFF is a trademark of Western Digital Technologies, Inc.
Other marks may be mentioned herein that belong to other companies. Picture shown may vary from actual product. Product specifications subject to change without
notice. © 2006 Western Digital Technologies, Inc. All rights reserved. 1 gigabyte (GB) = 1 billion bytes. Total accessible capacity varies depending on operating
environment.
Key Specifications
Interface: SATA
Form Factor: 3.5-inch
Spin Speed: 10,000 RPM
Cache: 16 MB
Access Time: 4.6 ms
Warranty: 5 years
Capacities
36 GB, 74 GB, 150 GB
Model Numbers
WD360ADFD, WD740ADFD,
WD1500ADFD
Frequently Asked Questions
What about SATA II – is this a SATA II drive?
SATA II is an industry specification to define those things necessary
for compatibility. SATA II has a number of optional features: NCQ,
SATA 3 Gb/s, port multiplier, port selector, asynchronous signal
recovery, soft settings preservation. All of these features are optional.
Instead of labeling a drive as “SATA II,” WD clearly and simply states
drive features. WD Raptor offers 36 to 150 GB, 10,000 RPM, 16 MB
cache, 1.5 Gb/s SATA, and SATA II NCQ. It’s important to understand
that hard drive performance is dependent on rotational speed and
seek time, not wire speed. The 10,000 RPM WD Raptor (at 1.5
Gb/s) outperforms ALL other SATA II (3 Gb/s) drives available today.
Does the WD Raptor offer queuing?
WD Raptor includes SATA II NCQ. Benchmark testing shows that
SATA II NCQ improves random I/O workload performance.
How does enterprise SATA compare to SCSI?
Enterprise SATA is proven. Problems related to reliability, performance,
and SATA RAID compatibility, have been resolved. Enterprise SATA
addresses all major enterprise requirements. SATA is in the
mainstream today because it brings SCSI-like performance and
reliability at a lower cost.
Is this drive compatible with SAS systems?
Yes, the WD Raptor drive is compatible with SAS systems, including
features such as hot plugability and NCQ.
Will SAS replace Enterprise SATA?
SAS systems are compatible with SATA hard drives. For the first
time, IT buyers can implement a single storage infrastructure that
offers both flexibility and scalability. Its ability to uniquely serve the
high-performance needs of the enterprise with SAS drives and also
the high-capacity needs with enterprise-class SATA storage allows it
to scale flexibly as enterprise needs change. This flexibility, combined
with efficiencies provided by combinations of SAS and SATA drives
that have common components (cables, connectors, enclosures and
backplanes) will allow the enterprise to meet new demand without
substantially growing existing IT budgets.
2178-001026-A05 Dec 2006