Western Digital WD GREEN WD15NPVX Product manual

Technical Reference Manual
WD CONFIDENTIAL
WD20NPVX
WD15NPVX
WD Green™MB500M-6Gb
SATA 6 Gb/s Hard Drives

© 2013 Western Digital Technologies, Inc.
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 Green, 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
U.S.A.
2679-771422-A00
Document Control Number Definition:
2679-771xxx- Axx-Px NRD
Doc Control No. Doc Revision Level Non-Released Document
Axx = Released Version
Px = Review Cycle
WD CONFIDENTIAL

2679-771422-A00 RELEASED 5/2/13 (WD CONFIDENTIAL)
WD Green MB500M-6Gb
Technical Reference Manual

RELEASED 5/2/13 (WD CONFIDENTIAL) 2679-771422-A00

WD Green MB500M-6Gb Table of Contents
2679-771422-A00 RELEASED 5/2/13 (WD CONFIDENTIAL) i
TABLE OF CONTENTS
1. DESCRIPTION AND FEATURES ................................................................................................. 1
1.1 General Description....................................................................................................................................................................... 1
1.2 Product Features ............................................................................................................................................................................ 1
2. SPECIFICATIONS....................................................................................................................... 3
2.1 Performance Specifications ......................................................................................................................................................... 3
2.2 Physical Specifications.................................................................................................................................................................. 4
2.2.1 Physical Dimensions ...................................................................................................................................................... 5
2.3 Mechanical Specifications............................................................................................................................................................ 6
2.4 Electrical Specifications................................................................................................................................................................ 7
2.4.1 Current Requirements and Power Dissipation ........................................................................................................ 7
2.4.2 Input Voltage Requirements......................................................................................................................................... 7
2.4.3 Ripple................................................................................................................................................................................. 7
2.4.4 Power Connectors and Cables................................................................................................................................... 7
2.4.5 ESD.................................................................................................................................................................................... 8
2.5 Environmental Specifications....................................................................................................................................................... 8
2.5.1 Shock and Vibration ....................................................................................................................................................... 8
2.5.2 Temperature and Humidity ........................................................................................................................................... 9
2.5.3 Thermocouple Location................................................................................................................................................. 9
2.5.4 Cooling............................................................................................................................................................................10
2.5.5 Atmospheric Pressure .................................................................................................................................................10
2.5.6 Acoustics ........................................................................................................................................................................10
2.5.7 RoHS (Restriction of Hazardous Substances) ......................................................................................................10
2.6 Reliability Specifications .............................................................................................................................................................10
2.7 Agency Approvals.........................................................................................................................................................................11
2.8 Full Model Number Specification..............................................................................................................................................11
3. PRODUCT FEATURES.............................................................................................................. 12
3.1 SATA 6 Gb/s.................................................................................................................................................................................13
3.2 Advanced Format (AF) ................................................................................................................................................................13
3.3 Fluid Dynamic Bearings (FDB)..................................................................................................................................................13
3.4 IntelliPower.....................................................................................................................................................................................13
3.5 Reduced Power Spinup (RPS) .................................................................................................................................................13
3.6 Perpendicular Magnetic Recording (PMR).............................................................................................................................14
3.7 System-on-Chip (SOC)..............................................................................................................................................................14
3.8 S.M.A.R.T. Command Transport (SCT)...................................................................................................................................14
3.8.1 Write Same ....................................................................................................................................................................14
3.8.2 Read/Write Long ..........................................................................................................................................................15
3.8.3 Temperature Reporting................................................................................................................................................15
3.9 Reliability Features Set................................................................................................................................................................15
3.9.1 Data Lifeguard™ ............................................................................................................................................................15
3.9.2 Thermal Management ..................................................................................................................................................16
3.9.3 Internal Environmental Protection System ..............................................................................................................16
3.9.4 Recoverable Errors.......................................................................................................................................................16
3.9.5 Unrecoverable Errors ...................................................................................................................................................16
3.9.6 Self Test ..........................................................................................................................................................................16
3.9.7 ATA Error Logging........................................................................................................................................................16
3.9.8 Defect Management.....................................................................................................................................................17
3.9.9 Automatic Defect Retirement.....................................................................................................................................17
3.9.10 Error Recovery Process...............................................................................................................................................17
3.10 Hot Plug Support..........................................................................................................................................................................17
3.11 Active LED Status ........................................................................................................................................................................18
3.12 Staggered Spinup and Activity Indication (SATA Power Pin 11) .....................................................................................18
3.12.1 Staggered Spinup ........................................................................................................................................................18
3.12.2 Activity Indication ..........................................................................................................................................................18
3.13 CacheFlow™ ..................................................................................................................................................................................18
3.13.1 Write Cache...................................................................................................................................................................19

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Table of Contents WD Green MB500M-6Gb
3.13.2 Read Cache ...................................................................................................................................................................19
3.13.3 48-bit Logical Block Addressing (LBA) ..................................................................................................................19
3.14 Power Management .....................................................................................................................................................................20
3.15 Self-Monitoring, Analysis, and Reporting Technology (S.M.A.R.T.)..................................................................................20
3.16 Security Mode ...............................................................................................................................................................................20
3.16.1 Master and User Passwords ......................................................................................................................................20
3.16.2 Security Levels ..............................................................................................................................................................20
4. AT COMMAND SET ................................................................................................................ 21
4.1 Host Interface Commands .........................................................................................................................................................21
4.1.1 ATA-7/ATA-8 Commands ..........................................................................................................................................21
4.1.2 SATA Commands.........................................................................................................................................................22
4.1.3 Obsolete Commands...................................................................................................................................................22
4.1.4 SCT Commands ...........................................................................................................................................................23
4.2 S.M.A.R.T. (B0h)...........................................................................................................................................................................23
4.2.1 Read Attribute Values Sub-Command ....................................................................................................................23
4.2.2 Supported Attributes ...................................................................................................................................................25
4.2.3 Read Log Sector...........................................................................................................................................................26
4.3 Identify Device (ECh)...................................................................................................................................................................27
4.4 Set Features (EFh) ......................................................................................................................................................................34
5. INSTALLATION AND SETUP PROCEDURES............................................................................. 35
5.1 Unpacking ......................................................................................................................................................................................35
5.1.1 Handling Precautions...................................................................................................................................................35
5.1.2 Inspection of Shipping Container .............................................................................................................................36
5.1.3 Removal From Shipping Container...........................................................................................................................36
5.1.4 Removal From Static Shielding Bag.........................................................................................................................36
5.1.5 Moving Precautions......................................................................................................................................................36
5.2 Bare Drive Handling External Force .........................................................................................................................................37
5.3 Mounting Restrictions..................................................................................................................................................................37
5.3.1 Orientation......................................................................................................................................................................37
5.3.2 Screw Type and Screw Length Limitations............................................................................................................37
5.3.3 Grounding.......................................................................................................................................................................38
5.4 Jumper Settings ............................................................................................................................................................................39
6. MAINTENANCE ........................................................................................................................ 40
7. TECHNICAL SUPPORT............................................................................................................. 41
7.1 WD Online Services ....................................................................................................................................................................41
8. GLOSSARY .............................................................................................................................. 42

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WD Green MB500M-6Gb List of Figures
LIST OF FIGURES
Figure 2-1 Mounting Dimensions...........................................................................................................................................6
Figure 2-2 Drive Base Casting Thermocouple Location ..................................................................................................9
Figure 2-3 Forced Airflow Direction ................................................................................................................................... 10
Figure 5-1 Drive Handling Precautions.............................................................................................................................. 35
Figure 5-2 Hard Drive Removal From Static Shielding Bag ......................................................................................... 36
Figure 5-3 Grounding Diagram ........................................................................................................................................... 38
Figure 5-4 Jumper Settings for WD SATA Hard Drives................................................................................................ 39

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WD Green MB500M-6Gb List of Tables
LIST OF TABLES
Table 2-1 Shock and Vibration ...............................................................................................................................................8
Table 2-2 Full Model Number Description........................................................................................................................ 11
Table 4-1 ATA-7/ATA-8 Command Opcodes................................................................................................................. 21
Table 4-2 Optional Subcommands ................................................................................................................................... 22
Table 4-3 Obsolete Command Opcodes ......................................................................................................................... 22
Table 4-4 SCT Action Codes .............................................................................................................................................. 23
Table 4-5 Definitions for the 512 Bytes. ........................................................................................................................... 23
Table 4-6 Log Address Definition ....................................................................................................................................... 26
Table 4-7 Identify Device Command.................................................................................................................................. 27

WD Green MB500M-6Gb Description and Features
2679-771422-A00 RELEASED 5/2/13 (WD CONFIDENTIAL) 1
1.0 DESCRIPTION AND FEATURES
1.1 General Description
WD Green hard drives are designed for use in systems that require cool and quiet operation, as
secondary drives in PCs, for external enclosures and other applications for which low noise and low
heat are beneficial. These earth-friendly drives are ideal for use whenever energy efficiency is needed.
1.2 Product Features
15 mm Height - 1.5 TB and 2 TB models are 15.0 mm high and are not compatible with
notebook systems. Targeted application is external hard drives.
Serial ATA (SATA) — Serial ATA (SATA) is the next generation bus interface for
2.5-inch 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.
Advanced Format (AF) — Technology adopted by WD and other drive manufacturers to
increase media format efficiencies, thus enabling larger drive capacities.
IntelliPower™ — A fine-tuned balance of spin speed, transfer rate and caching algorithms
designed to deliver both significant power savings and solid performance. For each WD Green
drive model, WD may use a different, invariable RPM.
Fluid Dynamic Bearings (FDB) — A bearing design that allows ultra-low rotational drag while
providing high lateral stiffness to steadily hold the spinning center of the diskpack for
high-accuracy of reading and writing of data. FDB provide increased shock robustness and
enhanced reliability while reducing power consumption and acoustics.
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.
Reduced Power Spinup (RPS) — WD’s optimized start up feature specifically designed for the
external hard drive and Consumer Electronics (CE) market. Specific focus for RPS is to minimize
the duration and magnitude of the peak power consumption from the hard drive.
System-on-Chip - The System-on-Chip (SOC) is the foundation for WD's next generation
electronics and firmware architecture. The native SATA SOC lowers component count by
integrating a hard disk controller, high performance processor, high speed execution SRAM, and
read channel in a 128-pin package.
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.
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.

Description and Features WD Green MB500M-6Gb
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Active LED Status — These drives support external LED requirements. It provides an activity
LED output which is ON during command execution and OFF otherwise.
Staggered Spin-Up — Native SATA feature that allows the system to control whether the drive
will spin up immediately or wait until the interface is fully ready.
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 drive.
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 — WD SATA drives support the ATA and Serial ATA power management
command set, allowing the host to reduce the power consumption of the drive by issuing a variety
of power management commands.
Automatic Defect Retirement — If the WD SATA drive detects a defective sector while reading,
writing, or performing offline data collection, it automatically relocates the sector without end-
user intervention.
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 — WD SATA drives support 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.

WD Green MB500M-6Gb Specifications
2679-771422-A00 RELEASED 5/2/13 (WD CONFIDENTIAL) 3
2.0 SPECIFICATIONS
2.1 Performance Specifications
Average Latency 5.8 ms
Rotational Speed IntelliPower
Data Transfer Rates1
- Interface Speed
- Internal Transfer Rate
6 Gb/s
135 MB/s (max)
Buffer Size 8 MB
Spindle Start Time
- From Power-on to Drive Ready 2 6.5s average
- From Power-on to Rotational Speed 3 4.5s average
Spindle Stop Time 8s average
Load/Unload Cycles4600,000
1During continuous Seek, Read, or Write commands, an algorithm in the code will add latency as required to keep
the VCM motor from overheating. Seek performance will be impacted under this condition.
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 specification published by
the SATA-IO organization as of the date of this document. Visit www.sata-io.org for details.
3Defined as the time from power-on to the setting of Drive Ready and Seek Complete including calibration.
4Defined as the time from power-on to when the full spindle rotational speed is reached.
5Controlled unload at ambient condition.

Specifications WD Green MB500M-6Gb
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2.2 Physical Specifications
Physical
Specifications
WD20NPVX WD15NPVX
Capacity12,000,398 MB 1,500,301 MB
Interface SATA 6 Gb/s SATA 6 Gb/s
Actuator Type Rotary Voice Coil Rotary Voice Coil
Number of Disks 4 4
Data Surfaces 8 8
Number of Heads 8 8
Physical Bytes per Sector 4096 4096
Host Bytes per Sector 512 512
User Sectors per Drive 3,907,029,168 2,930,277,168
Servo Type Embedded Embedded
Recording Method Partial DC Target Partial DC Target
ECC LDPC LDPC
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 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.

WD Green MB500M-6Gb Specifications
2679-771422-A00 RELEASED 5/2/13 (WD CONFIDENTIAL) 5
2.2.1 Physical Dimensions
English Metric
Dimension Tolerance Dimension Tolerance
Height 0.59 inches
(0.58 inches)
Max.
(Min.)
15.00 mm
(14.72 mm)
Max.
(Min.)
Length 3.94 inches ±0.01 inch 100.20 mm ±0.25 mm
Width 2.75 inches ±0.01 inch 69.85 mm ±0.25 mm
Weight (typical) 0.40 pounds — 182 gm —

Specifications WD Green MB500M-6Gb
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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

WD Green MB500M-6Gb Specifications
2679-771422-A00 RELEASED 5/2/13 (WD CONFIDENTIAL) 7
2.4 Electrical Specifications
2.4.1 Current Requirements and Power Dissipation
2.4.2 Input Voltage Requirements
The input voltage requirement for these drives is +5.0V ± 5%.
2.4.3 Ripple
2.4.4 Power Connectors and Cables
Serial ATA Connectors
For information on SATA data connectors, including the pin definitions of the SATA connectors and
the corresponding signal names and signal functions, refer to the latest SATA specification available for
download at www.sata-io.org.
Cabling Requirements for Serial ATA
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
specification for cable specifications. The cable's maximum length is one meter.
Operating Mode Current1Power1
5 VDC
Spinup (max)21000 mA 5.00 W
Read/Write (average) 340 mA 1.70 W
Seek (average) 400 mA 2.00 W
POWER MANAGEMENT COMMANDS
Operating Mode Current1Power1
5 VDC
Idle (E1H)(average) 150 mA 0.75W
Standby (E0H)(average) 35 mA 0.18W
Sleep (E6H)(average) 35 mA 0.18W
1All values are typical (25°C and 5V input) except where specified as maximum.
2In Reduced Power Spinup (RPS) mode, Spinup (max) = 750 mA.
+5 VDC
Peak-to-peak 100 mV
Frequency 0 - 30 MHz

Specifications WD Green MB500M-6Gb
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2.4.5 ESD
The ESD specification compliance is determined at room ambient conditions with nominal power
supply settings, unless otherwise specified.
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 or swept sinusoidal excitation in each linear axis, one axis at a
time. The drive incurs no physical damage and no hard errors while operating and 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 capability applies to handling and transportation of unmounted drives.
Drives are tested by applying a random or swept sinusoidal 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.
Drive Generated Vibration
Drives are tested by supporting a single drive horizontally in a free-free state and measuring the side-to-
side vibration. Self vibration may not exceed the level listed in Table 2-1.
Op-System Level Minimum
Direct contact discharges 8 kV
Direct air discharges 15 kV
Indirect contact discharges (VCP & HCP) 8 kV
Indirect air discharges (VCP & HCP) 15 kV
Non-Op Drive Level
Direct contact discharges 8 kV
Direct air discharges 15 kV
Shock
Operating (2 ms) 300G
Non-operating (2 ms) 650G
Note: Half-sine wave, measured without shock isolation and without non-recoverable errors.
Vibration
Operating10.00003 g2/Hz (10-500 Hz)
Non-operating20.06984 g2/Hz (10-500 Hz)
11.5grms
25.8grms
Drive Generated Vibration
Operating (average) 0.25 gm-mm
Rotational Shock Non-Operating
Amplitude 50K rad/sec2
Duration 2 ms

WD Green MB500M-6Gb Specifications
2679-771422-A00 RELEASED 5/2/13 (WD CONFIDENTIAL) 9
Rotational Shock Non-Operating
Drives are tested by applying a rotational force centered around the actuator pivot. The drive incurs no
physical damage when subjected to the rotational force specified 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.
2.5.2 Temperature and Humidity
2.5.3 Thermocouple Location
Figure 2-2. Drive Base Casting Thermocouple Location
Temperature & Humidity
Operating ambient temperature10°C to 60°C (32°F to 140°F)
Max base casting temperature260°C (140°F)
Humidity 8-90% RH non-condensing
29.4°C (maximum wet bulb)
Thermal Gradient 20°C/hour (maximum)
Humidity Gradient 20%/hour (maximum)
Non-operating Temperature -40°C to 65°C (-40°F to 149°F)
Humidity 5-95% RH non-condensing
40°C (maximum wet bulb)
Thermal Gradient 30°C/hour (maximum)
Humidity Gradient 20%/hour (maximum)
1The system environment must allow sufficient air flow to limit maximum surface temperatures as defined.
2See Figure 2-2.
Component Location
Drive base casting #1, Figure 2-2

Specifications WD Green MB500M-6Gb
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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 Figure 2-3.
Figure 2-3. Forced Airflow Direction
2.5.5 Atmospheric Pressure
2.5.6 Acoustics
2.5.7 RoHS (Restriction of Hazardous Substances)
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. 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.
2.6 Reliability Specifications
Altitude
Operating -1,000 feet to 10,000 feet (-305m to 3,048m)
Non-operating -1,000 feet to 40,000 feet (-305m to 12,192m)
TYPICAL SOUND POWER LEVEL1
Idle Mode (average dBA) 224
Seek Mode (average dBA) 325
1Measured per ECMA-74/ISO 7779.
2No audible pure tones.
3Random seek at a rate of 26 seeks per second.
Component Design Life 5 years
AFR <0.5%1
Power on Hours (POH) 3120
1Ambient temperature 35°C, HDD temperature 40°C.

WD Green MB500M-6Gb Specifications
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2.7 Agency Approvals
MB500M-6Gb Regulatory Number (R/N): 771933
These drives meet the standards of the following regulatory agencies:
Federal Communication Commission: Verified to comply with FCC Rules for Radiated and
Conducted Emission, Part 15, Subpart B, for Class B Equipment.
Underwriters Laboratories: Bi-National UL Standard CAN/CSA-C22.2 No. 60950/UL 60950-
1. Standard for Safety of Information Technology Equipment, including Electrical Business
Equipment (File E101559).
TUV NORD CERT GmbH: IEC-950 (EN60950) Standard for Safety of Information
Technology Equipment, including Electrical Business Equipment. EN60065. Standard of Safety
for Audio, Video, and Similar Electronic Apparatus.
CE Compliance for Europe: Verified to comply with EN55022:2006 for RF Emissions and
EN55024:1998, A1:2001 + A2:2003, EN61000-3-2:2000, EN61000-3-3:1995 + A1:2001 for
Generic Immunity as applicable.
C-Tick Compliance for Australia: Verified to comply with AS/NZ3548 for RF Emissions as
required by the Australian Communications Authority.
Korean RRL Mark: Registered as a Class-B product with the South Korean Ministry of
Information and Communication.
Taiwan BSMI EMI Certification: Certified as a Class-B product with the Bureau of Standards
Metrology and Inspection (BSMI).
2.8 Full Model Number Specification
Table 2-2 below provides a summary specification of the model number suffix for this product
platform.
Table 2-2. Full Model Number Description
Model Number Format ID Product Brand RPM Description
WD20NPVX-xxEA4Tx EA4 WD Green IntelliPower MB500M 8 MB SATA 6 Gb/s AF
WD15NPVX-xxEA4Tx EA4 WD Green IntelliPower MB500M 8 MB SATA 6 Gb/s AF

Product Features WD Green MB500M-6Gb
12 RELEASED 5/2/13 (WD CONFIDENTIAL) 2679-771422-A00
3.0 PRODUCT FEATURES
SATA 6 Gb/s
Advanced Format (AF)
Fluid Dynamic Bearings (FDB)
IntelliPower
Reduced Power Spinup (RPS)
Perpendicular Magnetic Recording (PMR)
System-on-Chip (SOC)
S.M.A.R.T. Command Transport (SCT)
Reliability Features Set—Data Lifeguard™
Hot Plug Support
Active LED Status
Staggered Spin-Up and Activity Indication (SATA Power Pin 11)
CacheFlow™
48-bit Logical Block Addressing (LBA)
Power Management
Self-Monitoring, Analysis, and Reporting Technology (S.M.A.R.T.)
Security Mode