Western Digital Mirror Edition About Your WD Drive

MY BOOK MIRROR EDITION

USER MANUAL

ABOUT YOUR WD DRIVE – 5

About Your WD Drive

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.

The Power/Activity and capacity gauge indicators are represented by a single bar of

four LEDs (lights) on the front panel of the device.

* 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.

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.

Appearance Drive State

Steady Power-on state or power-save mode

Slow flashing (every four seconds) System standby

Moving up and down Drive in use

Alternating checkerboard pattern Transitioning from one state to another

Alternate flashing between top and bottom LEDs RAID degraded mode

Cycling from bottom to top RAID rebuild mode

Fast flashing (every second) Over-temperature condition*