Hitachi HF-BX1000 Instruction Manual page 191

8. RAID1
Note: If the RAID1 status is displayed as "Optimal (Media Error)" after the rebuild process
is complete, we recommend that you also replace the copy source HDD with a new
HDD after backing up the data.
(For information about how to replace an HDD, see "5.3.5 Installing and removing
an HDD".)
After you replace both HDDs, set up the equipment again and recover the data from
the backup files.
(For information about how to set up the equipment again, see "8.2.2 Building a
RAID1 system newly".)
Alternatively, recover the equipment using a backup HDD.
(See "8.5.2 Recovery using a backup HDD".)
Hardware status window (When a media error occurs)
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