External Desktop

My Book

Mirror Edition

User Manual

Table of Contents

1 WD Service and Support.1
Registering Your WD Product. 2

Getting Started.2

Kit Contents. 2 Optional Accessories. 2 Compatibility. 3 Recording Your WD Product Information. 3 Precautions. 4

About Your WD Drive.5

Format and Configuration. 5 LED Indicators (Lights). 5 Power/Activity LED Behavior. 5 Capacity Gauge. 5 Interfaces. 6 Kensington Security Slot. 6 Software. 7

Setting Up.8

Windows. 8 Macintosh. 9
WD Drive Manager Status.12
WD Drive Manager Status Messages. 12
WD RAID Manager for Windows.13
Configuring RAID. 13 RAID Troubleshooting. 14
WD RAID Manager for Mac.17
Configuring RAID. 17 RAID Troubleshooting. 18

TABLE OF CONTENTS i

Turning Off/Disconnecting the Device.21
Auto-off. 21 Safe Shutdown. 21 Safe Removal. 21 Unplugging the Device. 21
Replacing a Drive.22 Troubleshooting.25 Appendix.26
Regulatory Compliance. 26 Warranty Information. 27

Index.28

TABLE OF CONTENTS ii
MY BOOK MIRROR EDITION USER MANUAL

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 e-mail support service at support.wdc.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. E-mail 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 https:// www.wdc.com/register. Accessing Online Support Visit our product support website at support.wdc.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. Contacting WD Technical Support When contacting WD for support, have your WD product serial number, system hardware, and system software versions available.
North America English Spanish 800.ASK.4WDC (800.275.4932) 800.832.4778 Asia Pacific Australia China Hong Kong India Indonesia Japan Korea Malaysia Philippines Singapore Taiwan 6682/++9393 (MNTL)/ (Reliance) (Pilot Line) +6550 +6008/88 1908/ ++6008/+6008/ ++6008/+65 62430496

Europe (toll free)*

00800 ASK4 WDEU (00800 27549338) +++31 880062100
Europe Middle East Africa
* Toll free number available in the following countries: Austria, Belgium, Denmark, France, Germany, Ireland, Italy, Netherlands, Norway, Spain, Sweden, Switzerland, United Kingdom.
Registering Your WD Product
Your WD product includes 30 days of free technical support during the applicable warranty period for your product. The 30-day period commences on the date of your first telephone contact with WD technical support. Register online at register.wdc.com.

WD SERVICE AND SUPPORT 1

Getting Started
Thank you for purchasing My Book Mirror Edition. This user manual provides step-by-step installation instructions and other important information regarding your WD product. For the latest WD product information and news, visit our website at www.westerndigital.com.

Kit Contents

Dual-drive storage system USB cable AC adapter* Quick Install Guide Software CD

Software CD

AC adapter (U.S.-only)* Quick Install Guide My Book Mirror Edition

USB cable

Global AC adapter configurations*
*This product may ship with a different AC adapter configuration, depending on your region.

Accessories

Visit shopwd.com (U.S. only) to view additional accessories like cables, power supplies, and carrying cases for this product. Outside the U.S., visit support.wdc.com.

GETTING STARTED 2

Compatibility

Windows Macintosh

Available USB port Windows 2000/XP/Vista
Available USB port Mac OS X 10.4.11+ Mac OS X 10.5.2+
Note: Compatibility may vary depending on users hardware configuration and operating system.
Important: For highest performance and reliability, it is recommended that you. install the latest updates and service pack (SP). For Macintosh, go to the Apple menu and select Software Update. For Windows, go to the Start menu and select Windows Update.
Recording Your WD Product Information
In the following table, write the serial number and model number of your new WD product found on the label on the bottom of the device. Also, write the purchase date and other notes such as your operating system and version. This information is necessary for setup and technical support.
Serial Number: Model Number: Purchase Date: System and Software Notes:

GETTING STARTED 3

Precautions
WD products are precision instruments and must be handled with care during unpacking and installation. Drives may be damaged by rough handling, shock, or vibration. Be aware of the following precautions when unpacking and installing your external storage product: Do not operate this device outside the temperature range of 5C35C (41F95F) Do not drop or jolt the device. Do not move the device when powered. Do not use the dual-drive storage system as a portable device. To avoid overheating, do not block air slots on the underside, top, or rear of the enclosure. Do not stack any objects on top of the device that may block ventilation.

GETTING STARTED 4

About Your WD Drive

Format and Configuration

This WD device is preformatted as a single Windows NTFS* partition and is pre-configured for RAID 1 (Mirrored) mode for extra data protection with instantaneous and automatic data updates. If one drive fails, the dual-drive storage system will still operate and your data will be preserved. You can replace the failed drive and rebuild the dual-drive storage system. This product also supports RAID 0 (Striped) mode for maximum capacity and accelerated performance. For more information on this product including instructions on changing the RAID configuration or drive format, see WD RAID Manager for Windows on page 13 or WD RAID Manager for Mac on page 17.

* To use this device with a Macintosh computer, you must reformat it to HFS+ (Journaled) or FAT32. See WD RAID Manager for Mac on page 17 for instructions.

LED Indicators (Lights)

The Power/Activity and capacity gauge indicators are represented by a single bar of four LEDs (lights) on the front panel of the device.
Power/Activity LED Behavior
Appearance Steady Slow flashing (every four seconds) Moving up and down Alternating checkerboard pattern Alternate flashing between top and bottom LEDs Cycling from bottom to top Fast flashing (every second) Drive State Power-on state or power-save mode System standby Drive in use Transitioning from one state to another RAID degraded mode RAID rebuild mode Over-temperature condition*
* If this condition occurs, read/write activity will stop and the drive will spin down. Disconnect and power down My Book. Allow it to cool down for 1-2 hours then reconnect and power up the device.

Capacity Gauge

When the device is turned on, the capacity gauge indicates space used on the drive by illuminating up to four sections in an upward vertical direction. Each section represents approximately 25 percent of drive capacity. Because this drive is preformatted, the first section is illuminated upon installation. The capacity gauge is enabled only through installation of WD Drive Manager, which must be installed on each system to which the device is connected. The capacity gauge is updated automatically as the drive is used.

ABOUT YOUR WD DRIVE 5

Interfaces
LED Power button/ Safe Shutdown Kensington Security Slot USB
USB The industry standard interface for most Windows-based computers. Hi-Speed USB (USB 2.0) supports data transfer rates up to 480 Mb/s. USB 2.0 is backward-compatible with USB 1.1. Connection to a USB 1.1 device transfers data at USB 1.1 speed (up to 1.5 Mb/s).

Kensington Security Slot

For drive security, this device is equipped with a Kensington Security Slot, which supports a standard Kensington security cable (sold separately). For more information on the Kensington Security Slot and available products, visit www.kensington.com.

ABOUT YOUR WD DRIVE 6

Software
In addition to WD Drive Manager, this WD product is shipped with the following bonus software. WD Anywhere Backup is an easy, one-time setup, backup application that allows you to preserve your data files with around-the-clock protection. Features include multiple destination backup and simple, intuitive file recovery.

ABOUT YOUR WD DRIVE 7

Setting Up

Windows

Important: You must first install WD Drive Manager on the included CD before connecting the unit. Follow the steps below to safely connect the device. 1. Turn on your computer and wait for the operating system to load. 2. Insert the software CD into the CD-ROM drive. 3. The CD autoruns. Click Accept in the terms of agreement screen and WD Drive Manager and drivers are installed automatically. WD Drive Manager enables the capacity gauge and Safe Shutdown and also installs WD RAID Manager. Note: If AutoPlay is disabled on your computer, you must install the utilities manually. Go to the desktop. Double-click My Computer, My Book folder, WD_Windows_Tools folder, and Setup.exe. Then run the CD which installs the drivers. 4. The Application Installer screen displays a list of options including software, documentation, and a registration link. All applications are selected by default. Deselect any applications you do not want to install, then click Start. Or, click Cancel to exit and no applications will be installed. 5. Connect the adapters DC cable plug to the DC power input at the rear panel of the product. Verify that plug type of your wall power adapter is the correct plug type for your region. If incorrect, remove it and install the correct one. 6. Connect the wall adapter to your AC power receptacle. 7. Plug one end of the USB interface cable into an available port on your computer. 8. Plug the other end of the interface cable into the device, after which the unit mounts to the system.

The WD Drive Manager icon appears in the system tray. Note: If Windows prompts for additional drivers, allow it to perform its search.
Note: To change the format of the device to RAID 0, follow the instructions in WD RAID Manager for Windows on page 13.

SETTING UP 8

Macintosh
Important: Follow the steps below to safely connect the device. 1. Turn on your computer and wait for the operating system to load. 2. Insert the software CD into the CD-ROM drive.
3. Double-click the CD-ROM drive icon.
4. Double-click the WD Drive Manager folder, which contains the software for this device
5. Double-click the WDDriveManager.dmg icon.
6. Double-click the WD Drive Manager Installer icon.
7. Click Install. WD Drive Manager enables the capacity gauge and Safe Shutdown and also installs WD RAID Manager.

SETTING UP 9

8. Click Accept to accept the license agreement and continue with the installation.

9. Click Quit.

10. Connect the adapters DC cable plug to the DC power input at the rear panel of the product. Verify that plug type of your wall power adapter is the correct plug type for your region. If incorrect, remove it and install the correct one. 11. Connect the wall adapter to your AC power receptacle. 12. Plug one end of the USB interface cable into an available port on your computer. 13. Plug the other end of the interface cable into the device.
14. The unit will power up and mount to the system, and WD Drive Manager will appear in the status menu. click the WD Drive Manager menu extra icon and point to WD My Book. Click Launch WD RAID Manager.

SETTING UP 10

15. Click on the device to display the pop-up menu. Select the desired RAID configuration and device format and click Configure.
16. When prompted to confirm, click Configure again. 17. As standard precaution, the system prompts you for an administrators name and password to authenticate your action. Enter this information and click OK.
The device is now installed and ready to use.

SETTING UP 11

WD Drive Manager Status
WD Drive Manager Status provides a quick view of the general status of the device. To view WD Drive Manager Status in Windows, roll the cursor over the WD Drive Manager system tray icon. Windows

Condition Icon

To view WD Drive Manager Status in Mac, click the WD Drive Manager status menu icon and point to WD My Book RAID. Mac

WD Drive Manager Status Messages
WD Drive Manager icon color/behavior Blue Blue flashing Blue Red flashing Condition icon color Green Yellow Yellow Red Meaning Healthy RAID 1 degraded RAID 1 rebuilding See WD Drive Manager Status for details
WD DRIVE MANAGER STATUS 12
WD RAID Manager for Windows
WD RAID Manager is a tool designed to help you easily manage your RAID system, including changing the RAID configuration and formatting the device. To launch WD RAID Manager, right-click the WD Drive Manager system tray icon and point to WD My Book. Click WD RAID Manager.

Configuring RAID

My Book Mirror Edition is preformatted as a single Windows NTFS partition and is pre-configured for RAID 1 (Mirrored) mode for data protection which dedicates half the capacity to mirror the data in both drives A and B. This product also supports RAID 0 (Striped) mode for maximum capacity and accelerated performance. Important: Before you proceed, make sure to back up all files stored in My Book onto another storage device. 1. To configure or change the RAID setting, select the device from the menu and click Next.
2. Select the desired RAID configuration by clicking RAID 0 or RAID 1 (the following example shows RAID 0). Select Quick NTFS format if you want the drive formatted automatically following completion of the new RAID setting.
WD RAID MANAGER FOR WINDOWS 13
3. Enter the confirmation number provided, then click Yes. When prompted again, click Yes to confirm.
4. Click Close when finished. You can also use the context menu in WD RAID Manager to run Windows Disk Management Tool, perform NTFS quick format, or change the RAID configuration. Right-click on a device in the WD RAID Manager main screen to view options.

RAID Troubleshooting

WD RAID Manager monitors the activity of the drives in the RAID system, so at anytime, you can view the status of each drive and take the appropriate action. To view the device status, select the device from the menu and click Next. If you dont see the device on the menu, click Refresh to search for My Book devices connected to your computer system. You can also right-click the device and choose Properties. In this screen, you can determine which drive (A or B) may have experienced a fault. This is reported in the Disk A or Disk B Serial Number field.

WD RAID MANAGER FOR WINDOWS 14
RAID Status Messages WD RAID Manager reports the following messages depending on the current status of your drive. Displayed Status Text Healthy Description Array is properly configured and operating normally. Drives from different RAID sets detected in slots. User Action None

Setting Mismatched

Both slots have valid array configurations, but they do not agree on the settings and the device is not able to determine which configuration is newer. Install another drive that is not part of a different RAID array. Install the original drive that is part of the RAID array.Create a new array with the installed drives.

Degraded

The array configuration is valid and is currently RAID1, but one slot is marked as faulty. The array configuration is valid, but one slot is being rebuilt from the other slot.
RAID 1 only Consult the slot status values to determine which slot is faulty and replace the drive. RAID 1 only Recovering from degraded mode. Wait for rebuild to complete. (This may take several hours.) Check disk status. See Disk Status Messages on page 16.

RAID Status Rebuilding

Neither slot contains a valid array configuration.
WD RAID MANAGER FOR WINDOWS 15
Disk Status Messages WD RAID Manager reports the following messages depending on the current status of your Disk A and B. Displayed Status Text Good Description The slot configuration contains valid data. Consult the array status to see if other errors have been detected. The slot contains no HDD The slot does not contain a valid configuration. User Action None

No hard disk No Config

Install drive in empty slot. Create New RAID set. (Loss of data) Mismatched capacity. Replace drive with identical capacity drive and re-create RAID set.
Faulty Rebuilding Good Rejected
The slot is marked as faulty. The slot is currently being rebuilt from the other slot. Initialization failed to complete. The slot contains an HDD that does not meet the units requirements.
Replace drive. Wait for rebuild to complete. This will take several hours. Replace other drive. Install drive that is compatible with RAID device. Only WD Green Drives are compatible.
WD RAID MANAGER FOR WINDOWS 16

WD RAID Manager for Mac

WD RAID Manager is a tool designed to help you easily manage your RAID system, including changing the RAID configuration and formatting the device. To launch WD RAID Manager, click the WD Drive Manager menu extra icon and point to WD My Book. Click Launch WD RAID Manager.
My Book Mirror Edition is preconfigured for RAID 1 (Mirrored) mode for data protection which dedicates half the capacity to mirror the data on both drives A and B. This product also supports RAID 0 (Striped) mode for maximum capacity and accelerated performance.

1. To configure or change the RAID setting, click on a device from the menu to display the popup menu.
WD RAID MANAGER FOR MAC 17
2. Select the desired RAID configuration and device format and click Configure. Important: Before you proceed, make sure to back up all files stored on the dual-drive storage system onto another storage device. 3. When prompted to confirm, click Configure again. 4. As standard precaution, the system prompts you for an administrators name and password to authenticate your action. Enter this information and click OK.
When configuring the device, WD RAID Manager automatically formats the disk as a single volume using the format and RAID type specified. FAT32 formats with a Master Boot Record partition map for Windows compatibility. The HFS+ setting formats with an HFS Extended w/ Journal volume using a partition map type which best matches the Macintosh model the drive is currently connected to. On Macintosh computers with PowerPC processor(s), an Apple Partition Map structure is created. On Macintosh computers with Intel processor(s), a GUID Partition Table is created.
WD RAID Manager monitors the activity of the drives in the RAID system so you can view the status of each drive and take the appropriate action. To view the device status as well as the status of each internal hard drive, including which drive (A or B) may have experienced a fault, click on a device and then click Info, which brings up a drawer on the right hand side of the main window.
WD RAID MANAGER FOR MAC 18
RAID 1 only Consult the slot status values to determine which slot is faulty and replace the drive. RAID 1 only Recovering from degraded mode. Wait for rebuild to complete. (This may take several hours.) Check disk status. See Disk Status Messages on page 20.
WD RAID MANAGER FOR MAC 19
WD RAID MANAGER FOR MAC 20
Turning Off/Disconnecting the Device

Auto-off

The device turns off automatically when you shut down the computer. You also may follow these steps to turn off the device. Note: My Book Mirror Edition supports a maximum capacity of 2TB (1TB per drive assembly) in a RAID 0 system or 1TB in a RAID 1 system. Important: To ensure warranty coverage during the 3-year limited warranty period on this product, use only WD RMA-certified WD Caviar GP hard drive assemblies for replacement into the My Book Mirror Edition enclosure.

Safe Shutdown

The Power button features Safe Shutdown, which prevents the inadvertent powering down of the device until all data is written to the device or system. To engage Safe Shutdown, press the Power button once. You may hear the device power down before the Power LED turns off. The device is now shut down properly and may be safely disconnected. Safe Shutdown is enabled only through installation of its driver, which must be installed on each system to which the device is connected.

Safe Removal

Windows Right-click on the WD Drive Manager icon in your system tray and point to My Book. > Safely Remove. You can also right-click the Safely Remove Hardware icon in your system tray and select Safely Remove Hardware. You may hear the device power down before the Power LED turns off. The device is now shut down properly, and you may disconnect it safely. Mac Drag the My Book icon to the Trash icon for proper dismount. You may hear the device power down as the Power LED flashes. When the Power LED is steady, you may press the Power button once or disconnect the devices power cord to turn it off safely.

Unplugging the Device

You may perform normal system shutdown at any time and remove the product thereafter. If the computer is still on, first follow the instructions under Safe Shutdown or Safe Removal above. 1. 2. 3. 4. Unplug the interface cable from the device. Unplug the other end of the interface cable from the computer port. Unplug the AC adapter from the power receptacle. Unplug the the DC power connector from the power supply socket on the back of the device.
TURNING OFF/DISCONNECTING THE DEVICE 21

Replacing a Drive

My Book Mirror Edition is a limited user-serviceable product which allows for servicing of one or both internal hard drives in the enclosure. Important: Only WD Caviar GP hard drive assemblies can be inserted into the My Book Mirror Edition enclosure. In the event a fault occurs and you would like to service the device yourself, visit WD Technical Support at support.wdc.com and search the knowledge base article 1709 for detailed instructions on obtaining a replacement drive. When contacting Technical Support, have the following items ready: My Book serial number, date of purchase, and the serial number of the internal hard drive(s) which require replacement. Once you have received the replacement drive(s), follow the steps below to service the dual-drive storage system. Important: To avoid electrostatic discharge (ESD) problems, ground yourself by touching the metal chassis of the computer before handling the device. Before getting started, power off the unit and disconnect all of its cables. 1. Place the unit on a clean and stable surface. 2. Using your thumb, firmly push down on the top front panel of the unit to release the latch and open the cover.

REPLACING A DRIVE 22

3. Loosen the thumbscrew that secures the drive cover plate. Remove the drive cover plate and set aside.
Note: Each drive is designated A or B by a color coded decal. 4. Locate the drive you wish to replace (A or B). Using the pulltab, carefully and slowly pull the drive assembly up and out of the enclosure and set aside.
5. Gently slide the replacement drive assembly into the drive slot until is fully inserted.

REPLACING A DRIVE 23

6. Replace the cover plate by sliding it under and between the pulltabs and securing it with the thumbscrew. Note: Do not overtighten the thumbscrew.
7. Close the cover and firmly push down until it locks into place.
8. Reconnect only the power cable to the device. Do not connect computer interface cables. 9. The drive starts the rebuild process automatically and the LEDs cycle from bottom to top. The RAID rebuild may take up to 12 hours depending on drive capacity and activity, but typically will complete in 5-7 hours. Allow the RAID rebuild to complete. Important: Do not attempt to use the device during the rebuild process. 10. Once complete, the LEDs will glow steadily to indicate power-on state. 11. Connect the interface cable. The WD Drive Manager Status displays (see WD Drive Manager Status on page 12). 12. Return the faulty drive following the instructions provided in the WD knowledge base article# 1709. Important: Do not disassemble the internal drive and attached assembly components. Return the entire internal drive assembly intact to WD.

REPLACING A DRIVE 24

Troubleshooting
If you have problems when installing or using this product, visit our support Web site at support.wdc.com and search our knowledge base for more help.
How to install My Book Mirror Edition on a Windows or Macintosh computer use My Book Mirror Edition with your computer system service My Book Mirror Edition to replace a hard drive change the RAID setting of a WD My Book Mirror Edition format the drive to Mac OS format install, partition, and format the drive in Windows XP/Vista install, partition, and format the drive in Windows 2000 make a device bootable on Intel-based Mac systems obtain and reinstall the original software included on the external hard drive obtain further information on external hard drive interfaces Answer ID 1425 1729

TROUBLESHOOTING 25

Appendix

Regulatory Compliance

FCC Class B Information
This device has been tested and found to comply with the limits of a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This unit generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio or television reception. However, there is no guarantee that interference will not occur in a particular installation. Any changes or modifications not expressly approved by WD could void the user's authority to operate this equipment.

ICES/NMB-003 Compliance

Cet appareil de la classe B est conforme la norme NMB-003 du Canada. This device complies with Canadian ICES-003 Class B.

Safety Compliance

Approved for US and Canada. CAN/CSA-C22.2 No. 60950-1, UL 60950-1: Safety of Information Technology Equipment. Approuv pour les Etats-Unis et le Canada. CAN/CSA-C22.2 No. 60950-1 : Sret d'quipement de technologie de l'information. This product is intended to be supplied by a listed limited power source, double insulated, or direct plug-in power unit marked Class 2.

CE Compliance For Europe

Marking by the CE symbol indicates compliance of this system to the applicable Council Directives of the European Union, including the EMC Directive (2004/108/EC) and the Low Voltage Directive (2006/95/EC). A Declaration of Conformity in accordance with the applicable directives has been made and is on file at Western Digital Europe.

GS Mark (Germany only)

Machine noise - regulation 3. GPSGV: Unless declared otherwise, the highest level of sound pressure from this product is 70db(A) or less, per EN ISO 7779. Maschinenlrminformations-Verordnung 3. GPSGV: Der hchste Schalldruckpegel betrgt 70 db(A) oder weniger gem EN ISO 7779, falls nicht anders gekennzeichnet oder spezifiziert.

VCCI Notice (Japan only)

This is a Class B product based on the standard of the Voluntary Control Council for Interference (VCCI) from information technology equipment. If this is used near a radio or television receiver in a domestic environment, it may cause radio interference. Install and use the equipment according to the instruction manual.
MIC Notice (Republic of Korea only)
Class B Device 1 Please note that this device has been approved for non-business purposes and may be used in any environment, including residential areas.
Environmental Compliance (China)
(Pb) O O O O O O O O O O O O O X O O O (PCB) (Cd) O O O O O O O O O O O O O O O O O (Hg) O O O O O O O O O O O O O O O O O IC MCV MCV (Cr6+) O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O (PBB) O O O O O O O O O O O O O O O O O (PBDE)

HDD EMI Kensington 6-32x6.35mm M3x5mm+5W

(PCA)*

APPENDIX 26

Warranty Information

Obtaining Service
WD values your business and always attempts to provide you the very best of service. If this Product requires maintenance, either contact the dealer from whom you originally purchased the Product or visit our product support Web site at support.wdc.com for information on how to obtain service or a Return Material Authorization (RMA). If it is determined that the Product may be defective, you will be given an RMA number and instructions for Product return. An unauthorized return (i.e., one for which an RMA number has not been issued) will be returned to you at your expense. Authorized returns must be shipped in an approved shipping container, prepaid and insured, to the address provided on your return paperwork. Your original box and packaging materials should be kept for storing or shipping your WD product. To conclusively establish the period of warranty, check the warranty expiration (serial number required) via support.wdc.com. WD shall have no liability for lost data regardless of the cause, recovery of lost data, or data contained in any Product placed in its possession.

Limited Warranty

WD warrants that the Product, in the course of its normal use, will for the term defined below, be free from defects in material and workmanship and will conform to WDs specification therefor. The term of your limited warranty depends on the country in which your Product was purchased. The term of your limited warranty is for 3 years in the North, South and Central America region, 3 years in the Europe, the Middle East and Africa region, and 3 years in the Asia Pacific region, unless otherwise required by law. The term of your limited warranty period shall commence on the purchase date appearing on your purchase receipt. WD shall have no liability for any Product returned if WD determines that the Product was stolen from WD or that the asserted defect a) is not present, b) cannot reasonably be rectified because of damage occurring before WD receives the Product, or c) is attributable to misuse, improper installation, alteration (including removing or obliterating labels and opening, disassembling, or removing external enclosures, including but not limited to the mounting frame, unless the product is on the list of limited user-serviceable products and the specific alteration is within the scope of the applicable instructions, as found at support.wdc.com), accident or mishandling while in the possession of someone other than WD. Subject to the limitations specified above, your sole and exclusive warranty shall be, during the period of warranty specified above and at WDs option, the repair or replacement of the Product. The foregoing warranty of WD shall extend to repaired or replaced Products for the balance of the applicable period of the original warranty or ninety (90) days from the date of shipment of a repaired or replaced Product, whichever is longer. The foregoing limited warranty is WDs sole warranty and is applicable only to products sold as new. The remedies provided herein are in lieu of a) any and all other remedies and warranties, whether expressed, implied or statutory, including but not limited to, any implied warranty of merchantability or fitness for a particular purpose, and b) any and all obligations and liabilities of WD for damages including, but not limited to accidental, consequential, or special damages, or any financial loss, lost profits or expenses, or lost data arising out of or in connection with the purchase, use, or performance of the Product, even if WD has been advised of the possibility of such damages. In the United States, some states do not allow exclusion or limitations of incidental or consequential damages, so the limitations above may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

Western Digital 20511 Lake Forest Drive Lake Forest, California 92630 U.S.A.
Information furnished by WD is believed to be accurate and reliable; however, no responsibility is assumed by WD for its use nor for any infringement of patents or other rights of third parties which may result from its use. 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, the WD logo, My Book, and WD Caviar are registered trademarks; and Mirror Edition, WD Anywhere, and Safe Shutdown are trademarks of Western Digital Technologies, Inc. Other marks may be mentioned herein that belong to other companies. 2009 Western Digital Technologies, Inc. All rights reserved. 4779-705011-A03 Jan 2009

APPENDIX 27

Auto-off 21

Product registration 1

Capacity gauge 5 Compatibility, system 3 Compliance, regulatory 26 Configuring RAID 13, 17
RAID configuring 13, 17 disk messages 16, 20 status messages 15, 19 troubleshooting 14, 18 Registration, product 1 Regulatory compliance 26 Replacing a drive 22 RoHS 26
Device disconnecting 21 turning off 21 Drive configuration 5 format 5 replacing 22 Drive status 12
Safe removal 21 Safe Shutdown 21 Safety compliance 26 Service, WD 1, 27 Software supplied on CD 7 WD RAID Manager-Mac 17 WD RAID Manager-Windows 13 Support, WD 1 System compatibility 3
Environmental compliance (China) 26 eSATA 6
FAQs 25 FCC Class B information 26 FireWire 6 Frequently asked questions 25
Troubleshooting 25 Turning off the device 21

Handling precautions 4

UL 26 Underwriters Laboratories Inc. 26 USB 6
ICES/NMB-003 compliance 26 Interfaces FireWire 800/400, USB, and eSATA 6
Warranty 27 Warranty, limited 27 WD service 1 support 1 WD Drive Manager status 12 WD RAID Manager Mac 17 Windows 13
Kensington Security Slot 6 Kit contents 2
LED indicators 5 capacity gauge 5 Limited warranty 27

Obtaining service 27

INDEX 28

Dual-drive Storage System

My Book

Mirror Edition
Dual-drive with RAID Mirroring Automatic Backup Software Cooler, Quieter, Eco-friendlier
The Safest Place for Your Data
The perfect backup system for your irreplaceable data, WDs My Book Mirror Edition dual-drive storage system offers RAID-based continuous data protection and userserviceability. It is the storage solution of choice for photographers, home users, small offices, and anyone looking for extra assurance that their data is safe.
In my field, staying on top requires keeping 100% of my clients critical data secure.

Thomas Kim

Tax Accountant
RAID mirroring This system automatically and continuously duplicates your data. If one drive in this two-drive system ever fails, the system continues to run and your data is safe. Hows that for peace of mind? Automatic backup software Back up your computerjust set it and forget it. Every time you save a change it's backed up and then mirrored on the second drive for the ultimate in data protection. Cooler, quieter, eco-friendlier Designed to use only WD drives with GreenPower technology, this system, with its efficient convection cooling architecture, fan-less design, and power-saving mode, is reliably cool, remarkably quiet, and consumes up to 33% less power* than standard systems.
* Tests based on comparison between a 1 TB dual-drive system using 7200 RPM drives and a 1 TB dual-drive system using WD's GreenPower drives.

My Book Mirror Edition

Interface USB 2.0 Dimensions Height: Depth: Width: Weight: 6.54 in (166 mm) 6.06 in (154 mm) 3.87 in (98 mm) 5.2 lb (2.63 kg)
System Compatibility Windows 2000/XP/Vista Mac OS X 10.4.11+, 10.5.2+
Compatibility may vary depending on users hardware configuration and operating system.
Capacities and Model Numbers 1 TB WDH2UTB WDH2U20000 Limited Warranty 3 years Kit Contents Dual-drive storage system USB cable AC adapter Software CD Quick Install Guide
This system automatically and continuously duplicates your data for the ultimate data protection.

Your data saved.

Your data saved again.

RAID 1 (Mirrored)

Product Specifications 480 Mb/s Data transfer rate1 (maximum) Temperature: Operating 5C to 35C 41 F to 95 F Non-operating -20C to 65C -4 F to 149 F
Here are some examples of how much you can store.

(RAID 1)

(RAID 0)

Photos or

142,000

285,000

570,000

Hours DVD or

125,000

250,000

500,000
Examples of the number of photos, songs, videos and any other files that can be stored on a hard drive are provided for illustrative purposes only. These numbers reflect a dual drive storage system using the full capacity (RAID 0). Your results will vary based on file size and format, settings, features, software and other factors.
A USB 2.0 host and USB 2.0 certified cable are required to obtain Hi-Speed USB Performance.
Western Digital, WD, the WD logo, Put Your Life On It and My Book are registered trademarks in the U.S. and other countries; Mirror Edition and GreenPower are trademarks of Western Digital Technologies, Inc. Other marks may be mentioned herein that belong to other companies. Pictures shown may vary from actual products. Not all products may be available in all regions of the world. All product and packaging specifications subject to change without notice. The term of your limited warranty is for 3-years, unless otherwise required by law. Please visit our web site at support.wdc.com/warranty for the detailed terms and conditions of our limited warranty. 2008 Western Digital Technologies, Inc. All rights reserved. One gigabyte (GB) = one billion bytes. One terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment. RAID 0 (striped) accesses the full capacity of the drives. RAID 1 (mirrored) accesses half of the total capacity for data protection. 4178-705018-A00 May 2008