Western Digital Purple PR1000M Product manual

Technical Reference Manual
WD CONFIDENTIAL
WD Purple™PR1000M
Surveillance Hard Drives
WD30PURX
WD20PURX
WD30PURZ
WD20PURZ
WD30EVRX
WD20EVRX

© 2017 Western Digital Corporation or its subsidiaries
All Rights Reserved
Information furnished by WD is believed to be accurate and reliable. No license is granted by
implication or otherwise under any patent or patent rights of WD. WD reserves the right to change
specifications at any time without notice.
Western Digital, WD, and the WD logo are registered trademarks in the U.S. and other countries;
and WD Purple, WD GreenPower Technology, IntelliPower, IntelliSeek, NoTouch, Data Lifeguard,
CacheFlow, and FIT Lab are trademarks of Western Digital Technologies, Inc. Other marks may be
mentioned herein that belong to other companies.
Western Digital
3355 Michelson Drive, Suite 100
Irvine, California 92612
2679-800020-A03-P3
Document Control Number Definition:
2679-800xxx- Axx-Px NRD
Doc Control No. Doc Revision Level Non-Released Document
Axx = Released Version
Px = Review Cycle
WD CONFIDENTIAL

2679-800020-A03 RELEASED 5/8/17 (WD CONFIDENTIAL)
WD Purple PR1000M
Technical Reference Manual

RELEASED 5/8/17 (WD CONFIDENTIAL) 2679-800020-A03

PR1000M TABLE OF CONTENTS
2679-800020-A03 RELEASED 5/8/17 (WD CONFIDENTIAL) v
TABLE OF CONTENTS
1. DESCRIPTION AND FEATURES ......................................................................... 1
1.1 GENERAL DESCRIPTION............................................................................ 1
1.2 PRODUCT FEATURES ...............................................................................................................................1
2. SPECIFICATIONS ............................................................................................ 4
2.1 Performance Specifications .........................................................................................................................................................4
2.2 Physical Specifications..................................................................................................................................................................4
2.2.1 Physical Dimensions.......................................................................................................................................................5
2.3 Mechanical Specifications............................................................................................................................................................5
2.4 Electrical Specifications................................................................................................................................................................6
2.4.1 Current Requirements and Power Dissipation.........................................................................................................6
2.4.2 Input Voltage Requirements .........................................................................................................................................6
2.4.3 Ripple.................................................................................................................................................................................6
2.4.4 Power Connectors and Cables ...................................................................................................................................6
2.5 Environmental Specifications.......................................................................................................................................................7
2.5.1 Shock and Vibration .......................................................................................................................................................7
2.5.2 Temperature and Humidity............................................................................................................................................8
2.5.3 Thermocouple Location.................................................................................................................................................8
2.5.4 Cooling..............................................................................................................................................................................9
2.5.5 Atmospheric Pressure ...................................................................................................................................................9
2.5.6 Acoustics ..........................................................................................................................................................................9
2.5.7 RoHS (Restriction of Hazardous Substances) ........................................................................................................ 9
2.6 Reliability Specifications and Characteristics....................................................................................................................... 10
2.7 Device Plug Connector Pin Definitions .................................................................................................................................. 10
2.8 Agency Approvals........................................................................................................................................................................ 12
2.9 Full Model Number Specification............................................................................................................................................. 12
3. PRODUCT FEATURES.................................................................................... 13
3.1 SATA 6 Gb/s................................................................................................................................................................................ 14
3.2 AllFrame 4K................................................................................................................................................................................... 14
3.3 IntelliPower.................................................................................................................................................................................... 14
3.4 IntelliSeek ...................................................................................................................................................................................... 14
3.5 Dynamic Fly Height Control ...................................................................................................................................................... 15
3.6 Perpendicular Magnetic Recording (PMR)............................................................................................................................ 15
3.7 NoTouch Ramp Load Technology ........................................................................................................................................... 15
3.8 Dual Stage Actuator Technology............................................................................................................................................. 15
3.9 Advanced Format (AF) ............................................................................................................................................................... 15
3.10 Native Command Queuing (NCQ).......................................................................................................................................... 16
3.11 Pre-emptive Wear Leveling (PWL).......................................................................................................................................... 16
3.12 Femto Slider.................................................................................................................................................................................. 16
3.13 S.M.A.R.T. Command Transport (SCT).................................................................................................................................. 16
3.13.1 Write Same ................................................................................................................................................................... 16
3.13.2 Temperature Reporting............................................................................................................................................... 17
3.14 World Wide Name (WWN) ...................................................................................................................................................... 17
3.15 Reliability Features Set............................................................................................................................................................... 17
3.15.1 Data Lifeguard™ ........................................................................................................................................................... 17
3.15.2 Thermal Management.................................................................................................................................................. 18
3.15.3 Internal Environmental Protection System.............................................................................................................. 18
3.15.4 Recoverable Errors ...................................................................................................................................................... 18
3.15.5 Unrecoverable Errors .................................................................................................................................................. 18
3.15.6 Self Test ......................................................................................................................................................................... 18
3.15.7 ATA Error Logging....................................................................................................................................................... 19
3.15.8 Defect Management.................................................................................................................................................... 19
3.16 Automatic Defect Retirement.................................................................................................................................................... 19
3.16.1 Error Recovery Process.............................................................................................................................................. 19
3.17 Hot Plug Support......................................................................................................................................................................... 20
3.18 Active LED Status........................................................................................................................................................................ 20

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TABLE OF CONTENTS PR1000M
3.19 Fluid Dynamic Bearings (FDB)................................................................................................................................................. 21
3.20 Staggered Spinup and Activity Indication (SATA Power Pin 11) .................................................................................... 21
3.20.1 Staggered Spinup........................................................................................................................................................ 21
3.20.2 Activity Indication ......................................................................................................................................................... 21
3.21 CacheFlow™ ................................................................................................................................................................................. 21
3.21.1 Write Cache.................................................................................................................................................................. 22
3.21.2 Read Cache .................................................................................................................................................................. 22
3.22 48-bit Logical Block Addressing (LBA) ................................................................................................................................. 22
3.23 Power Management .................................................................................................................................................................... 22
3.24 Self-Monitoring, Analysis, and Reporting Technology (S.M.A.R.T.)................................................................................. 24
3.25 SECURITY MODE....................................................................................24
3.25.1 Master and User Passwords ..................................................................................................................................... 24
3.25.2 Security Levels.............................................................................................................................................................. 24
4. ATA COMMAND SET .................................................................................... 25
4.1 Host Interface Commands......................................................................................................................................................... 25
4.1.1 ATA-8 Commands....................................................................................................................................................... 25
4.1.2 SATA Commands ........................................................................................................................................................ 26
4.1.3 Obsolete Commands.................................................................................................................................................. 26
4.1.4 SCT Commands .......................................................................................................................................................... 27
4.2 S.M.A.R.T. (B0h) .......................................................................................................................................................................... 27
4.2.1 Read Attribute Values Sub-Command ................................................................................................................... 27
4.2.2 Supported Attributes................................................................................................................................................... 29
4.2.3 Read Log Sector.......................................................................................................................................................... 30
4.3 Identify Device (ECh).................................................................................................................................................................. 31
4.4 Set Features (EFh) ..................................................................................................................................................................... 39
5. INSTALLATION AND SETUP PROCEDURES .......................................................40
5.1 Unpacking...................................................................................................................................................................................... 40
5.1.1 Handling Precautions.................................................................................................................................................. 40
5.1.2 Inspection of Shipping Container ............................................................................................................................ 40
5.1.3 Removal From Shipping Container.......................................................................................................................... 40
5.1.4 Removal From Static Shielding Bag........................................................................................................................ 41
5.1.5 Moving Precautions..................................................................................................................................................... 41
5.2 Mounting........................................................................................................................................................................................ 41
5.2.1 Mounting Restrictions ................................................................................................................................................. 41
5.2.2 Orientation..................................................................................................................................................................... 41
5.2.3 Screw Size Limitations ............................................................................................................................................... 41
5.2.4 Grounding...................................................................................................................................................................... 42
5.3 Hard Drive Installation................................................................................................................................................................. 42
5.3.1 Jumper Settings............................................................................................................................................................ 42
5.3.2 ATTACH THE POWER SUPPLY CABLE ...............................................44
5.3.3 ATTACH SATA INTERFACE CABLE................................................... 44
5.4 Serial ATA Latching Connector................................................................................................................................................ 44
6. MAINTENANCE ............................................................................................ 46
7. TECHNICAL SUPPORT .................................................................................................47
7.1 WD ONLINE SERVICES..........................................................................................................................47
8. GLOSSARY .................................................................................................. 48

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PR1000M List of Figures
LIST OF FIGURES
Figure 2-1 Mounting Dimensions...........................................................................................................................................5
Figure 2-2 Drive Base Casting Thermocouple Location ..................................................................................................8
Figure 2-3 Forced Airflow Direction ......................................................................................................................................9
Figure 2-4 Standard Factory Connectors......................................................................................................................... 10
Figure 5-1 Jumper Settings .................................................................................................................................................. 43
Figure 5-2 Connector Locations ......................................................................................................................................... 44
Figure 5-3 SATA Interface Cable........................................................................................................................................ 44

List of Figures PR1000M
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2679-800020-A03 RELEASED 5/8/17 (WD CONFIDENTIAL) ix
PR1000M List of Tables
LIST OF TABLES
Table 2-1 Shock and Vibration ...............................................................................................................................................7
Table 2-2 Device Pin Connector Pin Definitions........................................................................................11
Table 2-3 Full Model Number Description........................................................................................................................ 12
Table 4-1 ATA-8 Command Opcodes .............................................................................................................................. 25
Table 4-2 SATA Command Opcodes................................................................................................................................ 26
Table 4-3 Obsolete Command Opcodes ......................................................................................................................... 26
Table 4-4 SCT Action Codes .............................................................................................................................................. 27
Table 4-5 Definitions for the 512 Bytes. ........................................................................................................................... 27
Table 4-6 Log Address Definition ....................................................................................................................................... 30
Table 4-7 Identify Device Command.................................................................................................................................. 31

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List of Tables PR1000M

PR1000M DESCRIPTION AND FEATURES
2679-800020-A03 RELEASED 5/8/17 (WD CONFIDENTIAL) 1
1.0 DESCRIPTION AND FEATURES
1.1 GENERAL DESCRIPTION
WD Purple Surveillance Storage is built for 24/7 always-on surveillance in high-
definition security systems that use up to eight hard drives and up to 64 cameras.
Exclusive AllFrame 4K™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.
1.2 Product Features
Serial ATA (SATA) — Serial ATA (SATA) is the industry standard bus interface for
hard drives. It is designed to replace Parallel ATA, and has many advantages
including increased transfer rate, improved signal integrity, enhanced data
protection, and hot plug support.
AllFrame 4K™ — All WD Purple™ drives are equipped with AllFrame 4K™
technology, which improves ATA streaming to help reduce frame loss, improve
overall video playback, and increase the number of hard drive bays supported
within a NVR. Help make your surveillance solution future-ready knowing that WD
Purple™ drives are ready for ultra high definition cameras.
IntelliPower™ —A fine-tuned balance of spin speed, transfer rate and caching
algorithms designed to deliver both significant power savings and solid
performance. Additionally, these drives consume less current during startup
allowing lower peak loads on systems as they are booted.
IntelliSeek™ —Calculates optimum seek speeds to lower power consumption,
noise, and vibration.
Dynamic Fly Height Control —Designed to compensate for head/media
separation changes due to temperature and altitude. This feature adds video
quality margins across temperature and altitude changes.
Perpendicular Magnetic Recording (PMR) — With PMR technology the
magnetization of each data bit is aligned vertically to the spinning disk, rather
than longitudinally as has been the case in hard drive technology for decades.
This enables more data on a given disk than is possible with conventional
longitudinal recording, and provides a platform for future expansion of hard drive
densities.
NoTouch™ Ramp Load Technology —The recording head never touches the disk
media ensuring significantly less wear to the recording head and media as well as
better drive protection in transit.
Dual Stage Actuator Technology —A head positioning system with dual-stage
actuators that improves positioning accuracy over the data track(s). The primary
stage provides course displacement; the secondary stage uses piezo electric
motion to fine tune the head positioning to a higher degree of precision.
Advanced Format (AF) — Technology adopted by WD and other drive
manufacturers as one of multiple ways to continue growing hard drive capacities.
AF is a more efficient media format that enables increased areal densities.
Native Command Queuing (NCQ ) — Performance of a random I/O workload can
be improved through intelligent re-ordering of the I/O requests so they read/
write to and from the nearest available sectors and minimize the need for
additional disk revolutions or head actuator movement. This improvement can be
achieved though Native Command Queing (NCQ) , which is supported by these

DESCRIPTION AND FEATURES PR1000M
2RELEASED 5/8/17 (WD CONFIDENTIAL) 2679-800020-A03
hard drives.
Pre-emptive Wear Leveling (PWL) —This WD feature provides a solution for
protecting the recording media against mechanical wear. In cases where the
drive is so busy with incoming commands that it is forced to stay in a same
cylinder position for a long time, the PWL control engine initiates forced seeks so
that disk lubricant maintains an even distribution and does not become depleted.
This feature ensures reliability for applications that perform a high incidence of
read/write operations at the same physical location on the disk.
Femto Slider — These drives incorporate the femto slider form factor in which the
read/write head is mounted on the small, lightweight femto slider which allows
the head to move more quickly from track to track on the disk.
S.M.A.R.T. Command Transport (SCT) — The SCT Command Transport feature
set provides a method for a host to send commands and data to a device and for
a device to send data and status to a host using log pages.
World Wide Name (WWN) — The World Wide Name (WWN) defined in ATA/
ATAPI-7 is a modification of the IEEE extended unique identifier 64 bit standard
(EUI-64) and is comprised of three major components: naming authority,
organizationally unique identifier (OUI) and serial number. WD's OUI is 0014EEh.
Reliability Features Set-Data Lifeguard™ — Representing WD's ongoing
commitment to data protection, Data Lifeguard includes features that enhance
the drive’s ability to prevent data loss. Data Lifeguard data protection utilities
include thermal management, an environmental protection system, and
embedded error detection and repair features that automatically detect, isolate,
and repair problem areas that may develop over the extended use of the hard
drive. With these enhanced data reliability features, the drive can perform more
accurate monitoring, error repair, and deliver exceptional data security.
Hot Plug Support — SATA supports hot plugging (also known as “hot
swapping”), the ability to swap out a failed hard drive without having to power
down the system or reboot. This capability contributes to both data availability
and serviceability without any associated downtime, making it a critical feature
for extending SATA into enterprise applications.
Active LED Status — The drive supports external LED requirements. It provides an
activity LED output which is ON during command execution and OFF otherwise.
Fluid Dynamic Bearings (FDB) — Bearing design that incorporates a layer of high-
viscosity lubricant instead of ball bearings in the hard drive spindle motor. As an
alternative to conventional ball bearing technology, FDB designs provide
increased non-operational shock resistance, speed control, and improved
acoustics.
Staggered Spin-Up — SATA 3 Gb/s feature that allows the system to control
whether the drive will spin up immediately or wait until the interface is fully ready
(available for specific OEM configurations).
CacheFlow™ —WD’s unique, multi-generation caching algorithm evaluates the
way data is read from and written to the drive and adapts “on-the-fly” to the
optimum read and write caching methods. CacheFlow minimizes disk seek
operations and overheads due to rotational latency. CacheFlow supports
sequential and random write cache. With write cache and other CacheFlow
features, the user can cache both read and write data. The cache can hold
multiple writes and collectively write them to the hard disk.

PR1000M DESCRIPTION AND FEATURES
2679-800020-A03 RELEASED 5/8/17 (WD CONFIDENTIAL) 3
48-bit Logical Block Addressing (LBA) — WD SATA drives support both 48-bit and 28-
bit LBA and CHS-based addressing. LBA is included in advanced BIOS and operating system
device drivers and ensures high capacity disk integration.
Power Management — The drive supports the ATA and SATA power
management command set, allowing the host to reduce the power consumption
of the drive by issuing a variety of power management commands.
Self-Monitoring, Analysis, and Reporting Technology (S.M.A.R.T.) — S.M.A.R.T.
enables a drive’s internal status to be monitored through diagnostic commands at
the host level and during offline activities. S.M.A.R.T. devices employ data analysis
algorithms that are used to predict the likelihood of some near-term degradation
or fault conditions. When used with a S.M.A.R.T. application, the drive can alert
the host system of a negative reliability status condition. The host system can
then warn the user of the impending risk of data loss and recommend an
appropriate action.
ATA Security — The drive supports the ATA Security Mode Feature set. The ATA
Security Mode feature set allows the user to create a device lock password that
prevents unauthorized hard disk access even if the drive is removed from the
host computer. The correct password must be supplied to the hard drive in order
to access user data. Both the User and Master Password features are supported,
along with the High and Maximum security modes. The Master Password Revision
code is also supported. This feature varies by drive configuration and may not be
available on all configurations.

SPECIFICATIONS PR1000M
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2.0 SPECIFICATIONS
2.1 Performance Specifications
2.2 Physical Specifications
Specifications represented are of a typical production drive and may be subject to
change or variation without notice.
Rotational Speed 5400 RPM Class
Data Transfer Rate1
- Buffer to Host
- Host to/from Disk
6 Gb/s maximum
145 MB/s sustained (typical)
Buffer Size 64 MB
Error Rate - Unrecoverable <1 in 1014 bits read
Spindle Start Time
- From Power-on to Drive Ready
- From Power-on to Rotational Speed
14.5s average
9s average
Spindle Stop Time <15s average
Load/Unload Cycles (controlled unload at ambient
condition)
300,000
1 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 specification
published by the SATA-IO organization as of the date of this document. Visit www.sata-io.org for details.
Physical Specifications WD30PURX/WD30PURZ/
WD30EVRX
WD20PURX/WD20PURZ/
WD20EVRX
Capacity13,000,592 MB 2,000,398 MB
Interface SATA 6 Gb/s SATA 6 Gb/s
Number of Disks 32
Data Surfaces 64
Number of Heads 64
Physical bytes per sector 4096 4096
Host bytes per sector 512 512
User Sectors per Drive 5,860,533,168 3,907,029,168
Servo Type Embedded Embedded
Recording Method LDPC Target LDPC Target
1 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 3 Gb/s
transfer rate calculated according to the Serial ATA specification published by the
SATA-IO organization as of the date of this document. Visit www.sata-io.org for
details.

PR1000M SPECIFICATIONS
2679-800020-A03 RELEASED 5/8/17 (WD CONFIDENTIAL) 5
2.2.1 Physical Dimensions
2.3 Mechanical Specifications
Figure 2-1 shows the mounting dimensions and locations of the screw holes for the
drive.
Figure 2-1. Mounting Dimensions
English Metric
Dimension Tolerance Dimension Tolerance
Height 1.028 INCHES MAX 26.1 MM MAX
Length 5.787 INCHES MAX 147.0 MM MAX
Width 4.00 INCHES ±0.01 INCH 101.6 MM ±0.25 MM
Weight 1.40 POUNDS ±10% 0.635 KG ±10%

SPECIFICATIONS PR1000M
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2.4 Electrical Specifications
2.4.1 Current Requirements and Power Dissipation
All values are typical (25°C, 5.0V, and 12V input). 3.3V Serial ATA power not utilized in
this product.
2.4.2 Input Voltage Requirements
The input voltage requirements are +5.0V ± 5% and +12.0V ± 10%.
2.4.3 Ripple
2.4.4 Power Connectors and Cables
SATA Connectors
For information on SATA data connectors, refer to the Serial ATA 1.0 specification
available for download at www.serialata.org.
At the time of this printing, there are no published standards for SATA power/mating
connectors or power/data cable wire gauges.
Cabling Requirements for SATA
The SATA cable consists of four conductors in two differential pairs. The cable may
also include drain wires to be terminated to the ground pins in the SATA cable
receptacle connectors. See the SATA 1.0 specification for cable specifications. The
cable's maximum length is one meter.
Operating Mode Mean Current Power, Average
12 VDC 5 VDC
Spinup (max) 1.725A – 23.6W
Read/Write 250 mA 280 mA 4.4W
Seek 400 mA 270 mA 6.2W
POWER MANAGEMENT COMMANDS
Operating Mode Mean Current Power, Average
12 VDC 5 VDC
Idle 230 mA 260 mA 4.1W
Standby 7 mA 105 mA 0.6W
Sleep 7 mA 105 mA 0.6W
+12 VDC +5 VDC
Maximum
Frequency 200 mV (double amplitude)
0-30 MHz
100 mV (double amplitude)
0-30 MHz

PR1000M SPECIFICATIONS
2679-800020-A03 RELEASED 5/8/17 (WD CONFIDENTIAL) 7
2.5 Environmental Specifications
2.5.1 Shock and Vibration
Table 2-1. Shock and Vibration
Operating Vibration
Drives are tested by applying a random excitation in each linear axis, one axis at a
time. The drive incurs no physical damage and no hard errors while subjected to
continuous vibration not exceeding the level listed in Table 2-1. Operating
performance may degrade during periods of exposure to continuous vibration.
Non-Operating Vibration
Note: This specification applies to handling and transportation of unmounted drives.
Drives are tested by applying a random excitation in each linear axis, one axis at a
time. The drive incurs no physical damage when subjected to continuous vibration
not exceeding the level listed in Table 2-1.
Packaged Shock and Vibration
The shipping packaging is designed to meet the National/International Safe Transit
Association (N/ISTA) standards for packaged products. The drive incurs no physical
damage when subjected to the N/ISTA standards.
Shock
Operating 30G, 2 ms (read/write)
65G, 2 ms (read)
Non-operating (2 ms) 250G
Note: Half-sine wave, measured without shock isolation and without non-recoverable errors.
Vibration
Operating Linear: 20-300 Hz, 0.75G (0 to peak)
Random: 0.004 g2 /Hz (10-300 Hz)
Non-operating Linear: 20-500 Hz, 4.0G (0 to peak)
Random: 0.05 g2 /Hz (10-300 Hz)
Sweep Rate 0.5 octave/minute minimum
Drive Generated Vibration
Operating 0.2 gm-mm average with the drive in an unconstrained condition
Rotational Shock Non-Operating
Amplitude 20K rad/sec2
Duration 2 ms

SPECIFICATIONS PR1000M
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2.5.2 Temperature and Humidity
The system environment must allow sufficient air flow to limit maximum surface
temperatures as defined. AFR can be affected by workload and operating
temperature. See Section 2.6 on page 10 for further details.
2.5.3 Thermocouple Location
Figure 2-2. Drive Base Casting Thermocouple Location
Temperature & Humidity
Operating
0C to 65C on the base casting (see Drive Base Casting
Thermocouple Location below)
Humidity 5-95% RH non-condensing
37.7C (maximum wet bulb)
Thermal Gradient 20C/hour (maximum)
Humidity Gradient 20%/hour (maximum)
Non-operating Temperature
-40C to 70C on the base casting (see Drive Base Casting
Thermocouple Location below)
Humidity 5-95% RH non-condensing
35C (maximum wet bulb)
Thermal Gradient 30C/hour (maximum)
Humidity Gradient 20%/hour (maximum)
Component Location
DRIVE BASE CASTING #1, DRIVE BASE CASTING THERMOCOUPLE
LOCATION

PR1000M SPECIFICATIONS
2679-800020-A03 RELEASED 5/8/17 (WD CONFIDENTIAL) 9
2.5.4 Cooling
If forced air cooling is required, the drive must be positioned to receive airflow from
one or more fans as indicated in Forced Airflow Direction.
Figure 2-3. Forced Airflow Direction
2.5.5 Atmospheric Pressure
2.5.6 Acoustics
2.5.7 RoHS (Restriction of Hazardous Substances)
WD complies with the Restriction of Hazardous Substances (RoHS) Directive 2011/
65/EU of the European Parliament, which is effective in the EU beginning July 8, 2011.
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.
Altitude
Operating -1,000 feet to 10,000 feet (-305M to 3,050M)
Non-operating -1,000 feet to 40,000 feet (-305M to 12,200M)
TYPICAL SOUND POWER LEVEL
MEASURED PER ECMA-74/ISO 7779
Idle Mode (average dBA, no audible pure tones) 23
Seek Mode (average dBA) 24
Above drive
Below drive
Note: Air can flow in either direction along the path shown.

SPECIFICATIONS PR1000M
10 RELEASED 5/8/17 (WD CONFIDENTIAL) 2679-800020-A03
2.6 Reliability Specifications and Characteristics
The average Annualized Failure Rate (AFR) calculations assume operation at nominal
voltages, base casting temperature of 40°C, and the workload usage of a typical
surveillance environment. Workload is defined as the number of bytes transferred by
the user to/from the drive. If the system(s) that the drive is installed in are not
capable of meeting the characteristics listed below, please use a WD drive that
matches your system(s)' capability. Operating drives outside any of the reliability
characteristics listed below will result in a higher AFR.
2.7 Device Plug Connector Pin Definitions
These drives interface with the host I/O bus via the SATA interface connection
illustrated in Standard Factory Connectors below. The drive receives power from the
SATA power connection or legacy ATA 4-pin power connector J3 in Standard Factory
Connectors. Table 2-2 identifies the pin definitions of the SATA connectors and the
corresponding signal names and signal functions.
Figure 2-4. Standard Factory Connectors
Reliability Specification
Average AFR over the LImited Warranty Period 0.88%
Reliability Charateristics
Base Casting Temperature 40°
Annual Power on Hours (POH) <=8760
Annualized Workload Rate1<=180 TB/YR
Annualized Workload Rate = TB transferred x (8760 / recorded power-on hours)