Western Digital My Book Duo User Manual page 85

If your device is configured as . . .
A mirrored RAID 1 disk array
(continued)
JBOD individual drives
19. Go to http://support.wd.com
7 for information about downloading and restoring the WD software and disk
image
8644 for information about returning the defective drive.
20. If you removed your password before replacing the drive, use the WD Security
software to re-create it. (See "Password Protecting the Device" on page 47.)
THEN . . .
g. When the rebuild operation completes, the
device status display shows:
Current Configuration: RAID 1 (Mirrored)
RAID Status: Healthy
Drive 1 Status: Online
Drive 2 Status: Online
Your device is ready to use.
a. Verify that the My Book Duo drive that you
did not replace reappears in your computer's
file management utility listing.
b. The listing for the new/replacement drive
does not appear because you have to format
it using WD Drive Utilities RAID Management
Configuration function (see "Changing the
Device Configuration" on page 61).
c. When the erase/reformat operation
completes, verify that the file management
utility listing for the replacement drive
reappears.
Your replacement drive is ready to use.
and see Knowledge Base answer ID:
MY BOOK DUO
USER MANUAL
REPLACING A DRIVE – 80