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If a hard disk drive failure occurs in the RAID 5 or RAID 6 mode, the error display will appear as shown in the following table.
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 [1 down].
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 [2 down].
When the hard disk drive becomes faulty (down), replace it immediately.
Refer to the operating instructions of the extension unit.
* Contact your dealer about replacement of HDD units.
Important:
• In the RAID 5 mode:
If 2 or more hard disk drives become faulty (2 down) or when another hard disk drive becomes faulty during the data recov-
ery, it is impossible to recover data.
• In the RAID 6 mode:
If 3 or more hard disk drives become faulty (3 down) or when another hard disk drive becomes faulty during the data recov-
ery, it is impossible to recover data.
Source
At a hard disk drive error (failure)
In the process of the recovery
Recorder/
Extension unit
Monitor 2
(recorder)
LCD (extension
unit)
RAID 1 DOWN: [1down]
RAID 2 DOWN: [2down]
RAID 3 DOWN (only in the RAID 6 mode): [3down]
HDD indicator
(A/F (HDD access/
failure))
Lights red: The respective hard disk drive is faulty
(which can be recovered by replacing the hard
disk drive)
• In the RAID 5 mode, it indicates that the
respective hard disk drive is the first faulty
drive.
• In the RAID 6 mode, it indicates that the
respective hard disk drives are the first and
second faulty drive.
Blinks red: The respective hard disk drive is faulty
(which cannot be recovered even by replacing
the hard disk drive).
• In the RAID 5 mode, it indicates that the
respective hard disk drive is the second faulty
drive.
• In the RAID 6 mode, it indicates that the
respective hard disk drive is the third faulty
drive.
Lights red and orange alternate-
ly:
The respective hard disk drive in
the RAID 5/RAID 6 mode is
being recovered.
Recorder
[Error log]
(Refer to Operating
Instructions (PDF)
for further informa-
tion.)
RAID 1 DOWN:
Recorder: MAIN RAIDm 1 DOWN
Extension unit: EXTu RAIDm 1 DOWN
RAID 2 DOWN:
Recorder: MAIN RAIDm 2 DOWN
Extension unit: EXTu RAIDm 2 DOWN
RAID 3 DOWN:
Recorder: MAIN RAID6 3DOWN
Extension unit: EXTu RAID6 3DOWN
m: Operational mode
u: Unit number
RAID recovery failure:
Recorder: MAIN RAIDm
RECOVERY FAILURE
Extension unit: EXTu RAIDm
RECOVERY FAILURE
m: Operational mode
u: Unit number
Error recovery of the hard disk drive (when operating in the RAID
mode)
