Operating System Compatibility; Disk Drive Formats; Physical Description - Western Digital My Book Thunderbolt Duo User Manual

Operating System Compatibility

Your My Book Thunderbolt Duo dual-drive storage device and WD Drive Utilities
software are compatible with the following Mac OS X 10.6.8 or later operating systems
on Thunderbolt technology-enabled computers:
™
• Snow Leopard
• Lion
Compatibility can vary, depending on hardware configuration and operating system.
For highest performance and reliability, always install the latest software update. Go to
the Apple menu and select Software Update.

Disk Drive Formats

Your My Book Thunderbolt Duo dual-drive storage device is initially formatted with
HFS+J partitions and configured as a striped RAID disk array (RAID 0).
In the RAID configurations, both drives are formatted with a single HFS+J partition for
Mac OS X operating systems. In the JBOD configuration, each drive can be reformatted
as either:
• HFS+J for Mac computers
• exFAT for running Windows operating systems on Mac computers
Note: Older Windows operating systems might need a patch from Microsoft to recognize
the exFAT format. (See http://support.microsoft.com/?kbid=955704.)

Physical Description

As shown in Figure 2, the My Book Thunderbolt Duo dual-drive storage device has:
• A power/activity LED indicator on the front
• The power connector, Thunderbolt ports, and a security slot on the back
Power/Activity LED
Front View
Figure 2. Front and Rear Views of Your My Book Thunderbolt Duo Dual-drive Storage Device
Thunderbolt Ports
®
Kensington Security Slot
Power Connector
ABOUT YOUR WD STORAGE DEVICE – 3
MY BOOK THUNDERBOLT DUO
USER MANUAL
Rear View