Cantek WEWD20PURX Drive Specification Sheet PDF

™

WD Purple

Surveillance Hard Drives

WD Purple Surveillance Storage is built for 24/7
always-on surveillance in high-denition security
systems that use up to eight hard drives and up to 32
cameras. Exclusive AllFrame™ technology works with
ATA streaming to reduce error pixilation and video
interruptions that occur when desktop hard drives are
incorrectly used as storage in security systems.

INTERFACE

SATA 6 Gb/s

MODEL NUMBERS

WD40PURX
WD30PURX
WD20PURX
WD10PURX

Product Features

Desktop drives vs.
surveillance-class storage

WD Purple surveillance-class storage
has been tested to be compatible
in a wide-range of security systems.
These drives are designed to replace
standard desktop drives that were
not designed for the harsh 24/7
always-on, high-denition surveillance
environment. Desktop drives are
built to run for only short intervals
and are not engineered to withstand
high-temperature uctuations and
equipment vibrations found in a
typical surveillance application.

Surveillance storage for
peace-of-mind

Whether you’re protecting your
personal assets and loved ones
or monitoring the business you
worked hard to build, you can rely
on surveillance-class storage built
by one of the largest hard drive
manufacturers in the world.
WD Purple Surveillance Hard Drives
are designed for high temperature,
always-on, surveillance security
systems to ensure reliability and
quality video play back when
you need it most. Experience the
security of knowing you’re using a
surveillance–class drive designed by
a leader in the hard drive industry.

FORM FACTOR

3.5-inch

Improve performance
with AllFrame

WD Purple surveillance-class hard
drives are equipped with AllFrame
technology which works with ATA
streaming to reduce frame loss,
improve playback and increases the
number of drive bays supported.
AllFrame reduces video interruptions
that commonly occur when desktop
hard drives are incorrectly used as
storage in security systems. Missed
frames and lost footage is a serious
problem when an event occurs and
surveillance footage needs to be
retrieved. WD Purple with AllFrame
provides the condence you should
expect when it’s time to play back
and review critical surveillance
footage.

Engineered for compatibility

WD Purple surveillance hard drives
are built for compatibility with
industry-leading chassis and chip
set manufacturers for seamless
integration into your new or existing
video surveillance system.

ROTATIONAL SPEED

IntelliPower

Optimized performance for
up to 32 HD cameras

WD Purple hard drives are optimized
to support up to 32 high-denition
surveillance cameras, giving you the
exibility to upgrade and expand your
security system in the future.

Lower power consumption

Low power consumption is crucial
in high-temperature always-on
surveillance environments. With
exclusive IntelliSeek™ technology,
WD Purple drives calculate the
optimum seek speeds which lowers
power consumption, noise and
vibration that can damage and cause
drives to wear out more quickly.
When you invest in a premium
surveillance-class drive you worry
less while enjoying the benets over a
longer period of time.

™

CAPACITIES

1 TB to 4 TB

3-year limited warranty
(worldwide)

Trust a company with the condence
to stand behind their surveillance
storage products with a 3-year
limited warranty worldwide.

1 million hours MTBF

Best-in-class reliability for mainstream

3.5-inch form-factor surveillance
storage.*

* Based on a surveillance usage of <60 TB/year transferred at 25°C
ambient environment with up to 16 cameras.

The WD Advantage

WD puts our products through extensive Functional Integrity Testing (F.I.T.) prior to any product launch. This testing ensures our products consistently meet the
highest quality and reliability standards of the WD brand. WD also has a detailed Knowledge Base with more than 1,000 helpful articles as well as helpful software
and utilities. Our customer support lines have longer operational hours to ensure you get the help you need when you need it. Our toll-free customer support lines
are here to help or you can access our WD Support site for additional details.

WD Purple

™

Specications 4 TB 3 TB 2 TB 1 TB

Model number
Formatted capacity

1

2

User sectors per drive 7,814,037,168 5,860,533,168 3,907,029,168 1,953,525,168
Form factor 3.5-inch 3.5-inch 3.5-inch 3.5-inch
Advanced Format (AF) Yes Yes Yes Yes
RoHS compliant

3

Performance

Data transfer rate (max)
Buffer to host
Host to/from drive (sustained)

Cache (MB) 64 64 64 64
Rotational speed (RPM) IntelliPower IntelliPower IntelliPower IntelliPower

Reliability/Data Integrity

Load/unload cycles
Non-recoverable read errors per bits read

Limited warranty (years)

4

5

Power Management

Average power requirements (W)
Read/Write
Idle
Standby and Sleep

Environmental Specications

Temperature (°C, on the base casting)
Operating
Non-operating

Shock (Gs)
Operating (2 ms, read/write)
Operating (2 ms, read)
Non-operating (2 ms)

Acoustics (dBA)
Idle
Seek (average)

7

6

Physical Dimensions

Height (in./mm, max) 1.028/26.1 1.028/26.1 1.028/26.1 1.028/26.1
Length (in./mm, max) 5.787/147 5.787/147 5.787/147 5.787/147
Width (in./mm, ± .01 in.) 4/101.6 4/101.6 4/101.6 4/101.6
Weight (lb./kg, ± 10%) 1.50/0.68 1.40/0.64 1.40/0.64 0.99/0.45

WD40PURX WD30PURX WD20PURX WD10PURX
4 TB 3 TB 2 TB 1 TB

Yes Yes Yes Yes

6 Gb/s
150 MB/s

6 Gb/s
145 MB/s

6 Gb/s
145 MB/s

6 Gb/s
110 MB/s

300,000 300,000 300,000 300,000

<10 in 10

14

<10 in 10

14

<10 in 10

14

<10 in 10

14

3 3 3 3

5.1

4.5

0.5

0 to 65

-40 to 70

30
65
250

25
26

4.4

4.1

0.6

0 to 65

-40 to 70

30
65
250

23
24

4.4

4.1

0.6

0 to 65

-40 to 70

30
65
250

23
24

3.3

2.9

0.7

0 to 65

-40 to 70

30
65
350

21
22

1

Not all products may be available in all regions of the world.

2

As used for storage capacity, one megabyte (MB) = one million bytes, one gigabyte (GB) = one billion bytes, and one terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment. As used for buffer or cache, one megabyte (MB) = 1,048,576 bytes. As used for transfer

rate or interface, megabyte per second (MB/s) = one million bytes per second, and gigabit per second (Gb/s) = one billion bits per second. Effective maximum SATA 6 Gb/s transfer rate calculated according to the Serial ATA specication published by the SATA-IO organization as of the date of this specication
sheet. Visit www.sata-io.org for details.

3

WD hard drive products manufactured and sold worldwide after June 8, 2011, meet or exceed Restriction of Hazardous Substances (RoHS) compliance requirements as mandated by the RoHS Directive 2011/65/EU.

4

Controlled unload at ambient condition.

5

The term of the limited warranty may vary by region. Visit http://support.wd.com/warranty for details.

6

No non-recoverable errors during operating tests or after non-operating tests.

7

Sound power level.

Western Digital
3355 Michelson Drive, Suite 100
Irvine, California 92612
U.S.A.

For service and literature:

http://support.wd.com
www.wd.com

800.ASK.4WDC
(800.275.4932)

800.832.4778 Spanish
+800.6008.6008 Asia Pacic

00800.27549338 Europe

+31.880062100 Europe/Middle East/Africa

North America

(toll free where available)

Western Digital, WD, and the WD logo are registered trademarks in the U.S. and
other countries; WD Purple, AllFrame, IntelliSeek, IntelliPower, and FIT Lab are
trademarks of Western Digital Technologies, Inc. in the U.S. and other countries.
Other marks may be mentioned herein that belong to other companies. Product
specications subject to change without notice.

© 2014 Western Digital Technologies, Inc. All rights reserved.

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2879-800012-A02 Mar 2014