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● Replacement of a faulty hard disk
drive in the RAID mode
In the RAID 5 mode, it is possible to read data on the other
hard disk drives and recover data even when a single hard disk
drive becomes faulty (1DOWN).
In the RAID 6 mode, it is possible to read data on the other
hard disk drives and recover data even when 2 hard disk
drives become faulty (2DOWN).
Important:
• Do not turn off the power in the process of recovery. It may
result in recovery failure.
Note:
• Replace the faulty disk immediately and recover data when
a single hard disk drive becomes faulty (1DOWN) even in
the RAID 6 mode.
1
Replace the hard disk drive whose HDD access indi-
cator is lighting or blinking red.
(1) Hold down the removal knob on the HDD unit.
(2) Pull the lever up.
(3) Pull the HDD unit out from the HDD slot.
Pull the HDD unit out carefully so as not to drop it and
handle it gently so as not to give it a shock or vibration.
(1)
(3)
(2)
(2)
2
Insert a new HDD unit into the HDD slot respective to
the HDD access indicator.
Lift the lever on the HDD unit while holding down the
removal knob, and then insert the HDD unit all the way into
the HDD slot.
(1) Pinch the tab on the HDD slot with the hook on the
HDD unit securely.
(2) Press the lever down and push it until the removal
knob clicks.
(1)
(2)
3
The recognition process of the hard disk drive will
start automatically, and then the data recovery will
start. When the data recovery starts, the respective
HDD access indicator will light orange and red alter-
nately.
Data recovery will start soon after the "RCV START WAIT"
indication is displayed.
The following indication will be displayed during data
recovery (writing).
4
When the data recovery is complete, the HDD access
indicator will go off or light green.
When 2 hard disk drives are faulty (2DOWN) in the RAID 6
mode, the data recovery of the second faulty drive will start
after the recovery of the first one is complete.
(1)
31
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