Western Digital My Book Pro User manual

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My Book™Pro
Thunderbolt™2 RAID System
User Manual
My Book Pro User Manual

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WD Service and Support
Should you encounter any problem, please give us an opportunity to address it before returning
this product. Most technical support questions can be answered through our knowledge base
or email support service at http://support.wd.com. If the answer is not available or if you prefer,
please contact WD™at the best telephone number shown below.
Your product includes 30 days of free telephone support during the warranty period. This 30-
day period starts on the date of your first telephone contact with WD Technical Support. Email
support is free for the entire warranty period and our extensive knowledge base is available
24/7. To help us keep you informed of new features and services, remember to register your
product online at http://register.wd.com.
Accessing Online Support
Visit our product support website at http://support.wd.com and choose from these topics:
 Downloads—Download drivers, software, and updates for your WD product.
 Registration—Register your WD product to get the latest updates and special offers.
 Warranty & RMA Services—Get warranty, product replacement (RMA), RMA status, and
data recovery information.
 Knowledge Base—Search by keyword, phrase, or Answer ID.
 Installation—Get online installation help for your WD product or software.
 WD Community—Share your thoughts and connect with other WD users.
Contacting WD Technical Support
When contacting WD for support, have your WD product serial number, system hardware, and
system software versions available.
North America Europe (toll free)* 00800 ASK4 WDEU
English 800.ASK.4WDC (00800 27549338)
(800.275.4932) Europe [phone]
Spanish 800.832.4778 Middle East [phone]
Africa [phone]
Mexico 001 8002754932 Russia 8 10 8002 335 5011
South America Asia Pacific
Chile 1230 020 5871 Australia 1800 429 861 / 0011 800 2275 4932
Colombia 009 800 83247788 China 800 820 6682 / 400 627 6682
Venezuela 0800 100 2855 Hong Kong 3057 9031
Peru 0800 54003 India 1800 200 5789 / 1800 419 5591
Uruguay 000 413 598 3787 Indonesia 001 803 852 3993
Argentina 0800 4440839 Japan 0800 805 7293
Brazil 0800 7704932 Korea 02 2120 3415
0021 800 83247788 Malaysia 1800 817 477
New Zealand 0508 555 639 / 00800 2275 4932
Philippines 1800 1855 0277
Singapore 1800 608 6008
Taiwan 0800 225 593
Thailand 00 1800 852 5913
Other countries [phone]
* Toll free number available in the following countries: Austria, Belgium, Czech Republic, Denmark, France, Germany,
Ireland, Italy, Netherlands, Norway, Poland, Slovakia, Spain, Sweden, Switzerland, United Kingdom.

MY BOOK PRO
USER MANUAL
TABLE OF CONTENTS – iii
Table of Contents
WD Service and Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ii
Accessing Online Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ii
Contacting WD Technical Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ii
1 About Your WD Storage Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Kit Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Operating System Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Disk Drive Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Illuminated Power Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
USB Hub Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Drive Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Drive Door Latches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Reset Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Thunderbolt Interface Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
USB 3.0 Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Kensington® Security Slot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Registering Your Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Handling Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Connecting the Device and Getting Started . . . . . . . . . . . . . . . . . . . . . 7
Connecting the Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installing the WD Drive Utilities Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Managing and Customizing Your My Book Pro . . . . . . . . . . . . . . . . . 13
Checking Device Health . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Managing the RAID Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Checking the Device Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Changing the Device Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Erasing the Device Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Upgrading the Device Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Registering the Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Restoring the WD Software and Disk Image. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Safely Dismounting the Device Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4 Replacing a Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Determining Which Drive Failed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Contacting WD Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Removing and Replacing the Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5 Using the Device with Windows Computers . . . . . . . . . . . . . . . . . . . . 29

MY BOOK PRO
USER MANUAL
TABLE OF CONTENTS – iv
A Compliance and Warranty Information. . . . . . . . . . . . . . . . . . . . . . . . . 30
Regulatory Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
FCC Class B Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
ICES-003/NMB-003 Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Safety Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
CE Compliance For Europe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
KC Notice (Republic of Korea only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Environmental Compliance (China) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Warranty Information (All Regions Except Australia/New Zealand) . . . . . . . . . . . 32
Obtaining Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Warranty Information (Australia/New Zealand) . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Obtaining Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
GNU General Public License (“GPL”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

MY BOOK PRO
USER MANUAL
ABOUT YOUR WD STORAGE DEVICE – 1
About Your WD Storage Device
Welcome to your My Book™ Pro Thunderbolt™ 2 RAID device, featuring revolutionary
Thunderbolt 2 technology that sets new standards for data transfer speeds and
workflow flexibility in high-capacity storage.
This chapter includes the following topics:
Features
Kit Contents
Operating System Compatibility
Operating System Compatibility
Disk Drive Formats
Physical Description
Registering Your Device
Handling Precautions
Features
Move data at unprecedented speeds—Do more work in less time with ground-
breaking data transfer speeds using Thunderbolt technology. Your My Book Pro device
provides a fast way to get information to and from your external drives.
Multiple dual-drive storage configurations—Select RAID or Individual Drives modes:
 RAID 0 (Striped mode) for maximum capacity and accelerated performance.
 RAID 1 (Mirrored mode) for double-safe data protection by automatically creating a
second copy of your data. One of the drives stores your data and the other drive
saves a second copy. If either drive fails, your data is protected because it is
duplicated on the other drive.
 JBOD (Individual Drives mode) for using the two drives independently, and not
configured into a RAID array.
Enhance workflow efficiency—Use the two Thunderbolt 2 ports to daisy chain up to
six Thunderbolt storage devices to achieve maximum workflow efficiency and
productivity.
High-speed multitasking—The revolutionary bidirectional Thunderbolt 2 technology
delivers unmatched speed for multitasking projects.
Super-fast external boot capability—For information about using your My Book Pro
device as an external boot device using Mac OS X 10.7 or later, see the Apple Support
article at http://support.apple.com/kb/HT4718 or
http://docs.info.apple.com/article.html?path=Mac/10.7/en/mchlp1034.html.
User serviceable—When you need to replace a drive, easily do it yourself—no tools are
needed.
WD Drive UtilitiesTM software—Keep your device performing at its best by configuring
the drives, running diagnostics, and more.
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MY BOOK PRO
USER MANUAL
ABOUT YOUR WD STORAGE DEVICE – 2
Important: For the latest WD product information and news, visit our website at
http://www.westerndigital.com. For the latest software, firmware, and product
documentation and information, go to http://support.wd.com/downloads.
Kit Contents
As shown in Figure 1, your My Book Pro kit includes the following:
 My Book Pro device with the WD Drive Utilities software
 Thunderbolt cable
 USB 3.0 cable
 AC adapter (configuration varies, depending on region)
 Quick Install Guide
Operating System Compatibility
Your My Book Pro device and the WD Drive Utilities software are compatible with the
following operating systems:
Compatibility can vary, depending on hardware configuration and operating system.
Figure 1. My Book Pro Kit Components
Mac OS X Windows®
 10.7—Lion (USB interface only)
 10.8—Mountain Lion (USB interface only)
 10.8.5—Mountain Lion (Thunderbolt and
USB interface)
 10.9—Mavericks (Thunderbolt and
USB interface)
 10.10—Yosemite (Thunderbolt and
USB interface)
 Windows 7 (USB interface only)
 Windows 8 (USB interface only)
 Windows 8.1:
 32-bit—USB interface only
 64-bit—Thunderbolt and USB interface
My Book Pro Device
AC Adapter
Quick Install Guide
USB 3.0 Cable
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Thunderbolt Cable

MY BOOK PRO
USER MANUAL
ABOUT YOUR WD STORAGE DEVICE – 3
For highest performance and reliability, always install the latest software update and
service pack (SP). For Mac computers, go to the Apple menu and select Software
Update or App Store. For Windows computers, go to the Start menu and select
Windows Update.
Disk Drive Formats
Your My Book Pro device is initially formatted with HFS+J partitions for compatibility
with supported Mac OS X operating systems.
Using the WD Drive Utilities software, you can reformat the device drives with exFAT
partitions for compatibility with other computer operating systems.
If you want to use this device with a Windows computer, see “Using the Device with
Windows Computers” on page 29.
Physical Description
As shown in Figure 2, the front of the My Book Pro device has:
 An illuminated power button
 Two USB hub connectors
 A drive status LED for each drive
 Door latches for removing/replacing drives
Figure 2. My Book Pro Device Front View
Illuminated Power Button
USB Hub Connectors
Drive Door Latches
Drive Status LEDs

MY BOOK PRO
USER MANUAL
ABOUT YOUR WD STORAGE DEVICE – 4
As shown in Figure 3, the back of the My Book Pro device has:
 A Kensington®security slot
 A hole for accessing the device reset button
 Two Thunderbolt 2 ports
 A USB 3.0 port
 The DC power connector
Illuminated Power Button
Use the power button to:
 Safely power down the device
Use a short momentary button press to initiate the safe power-down function that
avoids data loss or damage to the device when you are using the USB interface.
This function only works when the WD Drive Utilities software is installed on your
computer.
To power the device back up from a safe power-down condition, you can either press
the button again or disconnect and reconnect the USB interface cable.
 Force a device power-down
Press and hold the button for four seconds or longer to initiate the forced power-
down function.
This function works even if the WD Drive Utilities software has not been installed on
your computer.
This function powers down the device regardless of the currently mounted disk
volumes. This might cause the operating system to display an unsafe removal
Figure 3. My Book Pro Device Rear View
Thunderbolt Ports
DC Power Connector
USB 3.0 Port
Reset Button Access Hole
Kensington
®
Security Slot

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USER MANUAL
ABOUT YOUR WD STORAGE DEVICE – 5
warning. To avoid the warning, perform the operating system’s safe removal action
before powering down the device.
If you leave the device connected to your computer after forcing a power-down, you
must press the power button again to power it back up. Unlike a safe power-down
function, disconnecting and reconnecting the USB interface cable will not power the
device back up.
Power button illumination shows the device status as follows:
USB Hub Connectors
Use the two front-panel USB hub connectors for additional devices.
Drive Status LEDs
The drive 1 and drive 2 status LEDs show each drive’s status as follows:
Drive Door Latches
The drive door latches provide quick and easy access to the internal hard drives. Just lift
the latch lever and lower the drive door to remove and replace a drive.
Reset Button
Use the reset button to force a device reset.
Thunderbolt Interface Ports
 Performance—Thunderbolt technology delivers unprecedented data transfer rates
thanks to its revolutionary bidirectional I/O throughput. Each Thunderbolt port
provides a bidirectional channel with up to 20 Gb/s of bandwidth.
 Simplicity—Thunderbolt technology supports daisy chaining multiple devices
through a single Thunderbolt connector so you can multitask at Thunderbolt
technology speed without having to use a switch or hub.
 Flexibility—Connect additional Thunderbolt technology-enabled external hard
drives, media players, HD displays, media capture and editing systems, and more
through a single connector.
LED Appearance Status
White, on steady Powered up/on and ready
White, pulsing dim System standby
Red, flashing Powered up with a degraded RAID volume or other failure condition
Off Powered down/off
LED Appearance Status
White, on steady Idle
White, flashing Drive activity
Red, on steady Drive fault/failure condition or the RAID volume is missing
Off No drive installed

MY BOOK PRO
USER MANUAL
ABOUT YOUR WD STORAGE DEVICE – 6
USB 3.0 Port
USB 3.0 supports data transfer rates up to 5 Gb/s. USB 3.0 is backward compatible with
USB 2.0. Connection to a USB 2.0 port transfers data at the port speed—up to
480 Mb/s.
Kensington® Security Slot
For physical device security, the Kensington security slot accepts a standard Kensington
security cable (sold separately). For more information about the Kensington security slot
and available products, visit http://www.kensington.com.
Registering Your Device
Always register your My Book Pro device to get the latest updates and special offers.
You can easily register your device using the WD Drive Utilities software, as described in
“Registering the Device” on page 20. Another way is to register online at
http://register.wd.com.
Handling Precautions
WD products are precision instruments and must be handled with care during unpacking
and installation. Drives can be damaged by rough handling, shock, or vibration. Observe
the following precautions when unpacking and using your external storage product:
 Do not drop or jolt the device.
 Do not move the device during power-on state.
 Do not operate the device in any position other than the standing upright position.
 Do not use this product as a portable device.
 Do not place the device on carpeting. Make sure the device is on a clean, firm, and
stable surface.
 To allow proper ventilation, do not block any of the enclosure’s air slots.

MY BOOK PRO
USER MANUAL
CONNECTING THE DEVICE AND GETTING STARTED – 7
Connecting the Device and Getting Started
This chapter provides instructions for:
Connecting the Device
Installing the WD Drive Utilities Software
Connecting the Device
1. Turn on your computer.
2. Connect the provided AC adapter to a power receptacle and to the DC power
connector on the device:
3. Determine which interface you want to use, Thunderbolt or USB:
See “Managing and Customizing Your My Book Pro” on page 13 to read about the
drive management functions of the WD Drive Utilities software.
IF you want to . . . THEN you . . .
Go right to work using your My Book Pro
with the default RAID 0 (Striped)
configuration and defer the drive
management functions of the WD Drive
Utilities software
Can use either the Thunderbolt or USB 3.0
interface.
Change to the RAID 1 (Mirrored) or
Individual drives (JBOD) configuration, or
use the drive management functions of the
WD Drive Utilities software
Must use the USB 3.0 interface and install
the WD Drive Utilities software.
Note: You can easily switch between the Thunderbolt and USB interfaces.
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MY BOOK PRO
USER MANUAL
CONNECTING THE DEVICE AND GETTING STARTED – 8
4. Depending on the interface that you want to use:
 For Thunderbolt—Use the Thunderbolt cable to connect either Thunderbolt port
on the device to your computer:
 For USB—Use the USB 3.0 cable to connect the USB port on the device to your
computer:
Note: You can use either the Thunderbolt or the USB interface, but not both.
Note also: If you later need to update the firmware on your My Book Pro device,
then you will have to use the USB 3.0 interface to do so.
5. If you are using the Thunderbolt interface, use the other Thunderbolt port on the
device to connect additional Thunderbolt peripherals.
Note: Thunderbolt technology supports a total of seven devices—your
computer and up to six Thunderbolt storage devices.
6. The device automatically powers up and mounts to your computer.

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USER MANUAL
CONNECTING THE DEVICE AND GETTING STARTED – 9
7. Verify that the My Book Pro device appears under DEVICES in the Sidebar area of
your Finder display:
Note: If the External disks check box is selected on your Finder Preferences
dialog, the My Book Pro icon displays on your desktop:
Your My Book Pro device is ready to use, but you should first install the WD Drive
Utilities software to manage your device.
Installing the WD Drive Utilities Software
1. Double-click either the My Book Pro Finder listing or its desktop icon, and then
double-click the WD Apps Setup file on the screen that displays:

MY BOOK PRO
USER MANUAL
CONNECTING THE DEVICE AND GETTING STARTED – 10
2. On the WD Apps Setup screen, Software Installer dialog:
a. Click the Western Digital End User License Agreement link and read the
agreement.
b. Select the I agree... check box to signify that you accept the agreement and
activate the Next button.
c. Click Next.
3. Type your computer logon password in the Password box and click OK:

MY BOOK PRO
USER MANUAL
CONNECTING THE DEVICE AND GETTING STARTED – 11
4. When the installation completes, click Next:
5. On the Installation Complete dialog:
Click:
 Manage your drive... to open the WD Drive Utilities software. (See Figure 4 on
page 12 and “Managing and Customizing Your My Book Pro” on page 13.)
 The Register your product link to access the WD Support Portal web page.
 Finish to close the Installation Complete dialog.

MY BOOK PRO
USER MANUAL
CONNECTING THE DEVICE AND GETTING STARTED – 12
Figure 4. WD Drive Utilities Screens
Note: The capacity displayed on these screens is an example. You will see a displayed
capacity that matches your connected device.
Using the USB Interface
Using the Thunderbolt Interface

MY BOOK PRO
USER MANUAL
MANAGING AND CUSTOMIZING YOUR MY BOOK PRO – 13
Managing and Customizing Your My Book Pro
This chapter includes the following topics:
Checking Device Health
Managing the RAID Configuration
Erasing the Device Drives
Registering the Device
Restoring the WD Software and Disk Image
Safely Dismounting the Device Drives
The WD Drive Utilities software (see Figure 4 on page 12) makes it easy for you to
manage and customize your drive for the best possible performance:
 Diagnose—Run diagnostics and status checks to make sure your drive is working
properly.
 RAID Management—Check the operational status or change the device drive
configuration.
 Sleep Timer—Turn your drive off during extended periods of inactivity to conserve
power and extend the life of the drive.
 Drive Erase—Erase all of the data on the drive.
 About—See the installed software version, check for software updates, and register
your device to receive free technical support during the warranty period and find out
about product enhancements and price discount opportunities.
Important: To use the drive management functions of the WD Drive Utilities software,
your My Book Pro device must be connected to your computer using the USB
interface. This configuration of the WD Drive Utilities screen signifies that your device is
connected using the Thunderbolt interface:
Click Configuration to see the Configuration dialog explaining that you must switch to
the USB interface to use the WD Drive Utilities drive management functions:
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MY BOOK PRO
USER MANUAL
MANAGING AND CUSTOMIZING YOUR MY BOOK PRO – 14
Checking Device Health
The WD Drive Utilities software provides three diagnostic tools to help make sure that
your drive is performing well. Run the following tests if you are concerned that your drive
is not operating properly:
 Drive status check
The drive status check is a failure-prediction function that continuously monitors key
internal performance attributes of the device drives. A detected increase in drive
temperature, noise, or read/write errors, for example, can provide an indication that
the drive is approaching a serious failure condition. With advanced warning, you
could take precautionary measures, like moving your data to another device, before
a failure occurs.
The result of a drive status check is a pass or fail evaluation of the drive’s condition.
 Quick drive test
Your device drives have a built-in Data Lifeguard™diagnostic utility that tests the
drive for error conditions. The quick drive test checks the drive for major
performance problems.
The result of a quick drive test is a pass or fail evaluation of the drive’s condition.
 Complete drive test
The most comprehensive drive diagnostic is the complete drive test. It tests every
sector for error conditions and inserts bad sector markers as required.
The best time to run the drive diagnostics and status checks is on a regular basis, before
you encounter any problems with your drive. And, because they are so fast, running the
drive status check and the quick drive test provides a high level of assurance with
minimal inconvenience. Then, run all three whenever you encounter disk error conditions
when writing or accessing files.
1. Click Go > Applications >WD Drive Utilities to display the WD Drive Utilities
screen, Diagnose dialog (see Figure 4 on page 12).
2. If you have more than one supported device connected to your computer, select the
one that you want to check.
3. On the Diagnose dialog, click the button for the test that you want to run:
 Run Drive Status Check
 Run Quick Drive Test
 Run Complete Drive Test
Managing the RAID Configuration
The initial/default configuration of your My Book Pro device is as a striped RAID 0 disk
array for high-speed/maximum-storage performance. You can reconfigure the device as
either:
 A mirrored RAID 1 disk array for maximum-protection/reduced-storage
 JBOD individual drives that can be formatted differently for enhanced flexibility

MY BOOK PRO
USER MANUAL
MANAGING AND CUSTOMIZING YOUR MY BOOK PRO – 15
Checking the Device Status
The WD Drive Utilities software provides a status indication of the device configuration
and each device drive.
1. Click Go > Applications >WD Drive Utilities to display the WD Drive Utilities screen
(see Figure 4 on page 12).
2. If you have more than one supported device connected to your computer, select the
one that you want to check.
3. Click RAID Management > RAID Status to display the device status:
4. The status display shows:
 Current Configuration as either:
- RAID 0 (Striped)
- RAID 1 (Mirrored)
- Individual Drives (JBOD)
 RAID Status where:
This status indication . . . Signifies that . . .
Cannot Access Data The RAID disk array has errors and your data is
not accessible.
Data Lost Detected The RAID disk array contains errors and the drives
have corrupted data.
Degraded The RAID disk array is degraded but your data is
still accessible. Install a supported WD drive and
rebuild the RAID disk array.
Healthy The RAID disk array is healthy. Your data is
accessible.
Not Configured No RAID disk array has been created. Either one
or both device are new.
Rebuild Failed The RAID disk array could not be rebuilt but your
data is still accessible. Try rebuilding the array
again.
Rebuilding (x%) The RAID disk array is rebuilding but your data is
still accessible.
Unknown The RAID configuration is unknown. Click
Configure to create a new RAID disk array or
reinstall the original drives.

MY BOOK PRO
USER MANUAL
MANAGING AND CUSTOMIZING YOUR MY BOOK PRO – 16
 For RAID configurations, Drive 1 Status and Drive 2 Status where:
Changing the Device Configuration
CAUTION! Changing the device configuration reformats both drives, which erases all of
the data on them. If you have been using the device in one mode and then want to
switch to a different mode, back up your files to another storage device before changing
the configuration.
Note: Changing the device configuration also deletes the WD software and all of
the support files, utilities, and user manual files. You can download these
to restore the device to its original configuration after the change. (See
Knowledge Base Answer ID 7 at http://support.wd.com for information
about downloading and restoring the WD software and disk image.)
To change the device configuration:
1. Click Go > Applications > WD Drive Utilities to display the WD Drive Utilities screen
(see Figure 4 on page 12).
2. If you have more than one supported RAID storage device connected to your
computer, select the one that you want to configure.
This status indication . . . Signifies that . . .
Drive Not Supported The drive model is not supported. Replace the
drive with a supported WD drive.
Empty There is no drive installed, but none was
expected.
Failed The drive has failed. Replace this drive
immediately.
ID Mismatch The drive metadata information does not match
its serial number.
Insufficient Capacity The drive you installed has insufficient capacity to
be part of the mirrored RAID disk array. You could
use it to create a new RAID disk array of smaller
capacity by performing a new RAID configuration,
but that would erase all of your data.
Missing The expected drive is not installed.
New Drive The installed drive has not been configured. Click
Configuration and reconfigure the RAID disk
array.
Online The drive is healthy and part of the RAID disk
array.
Rebuilding The drive is the target disk of the rebuild operation
and that rebuild operation is still in progress.