Hitachi HF-W2000 Instruction Manual page 292

10. SOFTWARE RAID1
7. When rebuilding has been completed, the HDD status indicator turns off and RAID1
is restored. On the hardware status display window, click the Refresh button and
confirm that the RAID status is shown as [Optimal] and the HDD status of the drive
bay where the HDD was replaced is shown as "Healthy".
Hardware Status Window (Normal)
10-13