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Symptom Checkitem/Remedy Ref. Page
Theextensionunitisnotrec-
ognized (even when con-
nectingtheextensionunit).
• Wasthepoweroftheextensionunitturnedonbeforeturning
on the power of the recorder? Reboot the system and turn on
the power of the extension unit first.
–
• Whenusingacircuitbreakerorequivalentdevicetoturnon/off
the power of the whole system at once, make sure that all
devices are connected to the same power source.
–
• WhenusinganUPS(uninterruptiblepowersupply),connectall
devices to the same UPS.
–
The hard disk drive is not
recognized.
The HDD status indicator
does not light.
• MakesurethattheHDDunitisinsertedallthewayintothe
HDD slot.
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• Theharddiskdriveisfaulty.
–
The HDD unit is not recog-
nized even though the HDD
status indicator is lit.
• AddtheHDDunittothesystemagain.
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The HDD indicator is being
litred/blinkingred.
• MakesurethattheHDDunitsareinstalledinorderfromHDD1
to HDD4.
Install the HDD units one by one in order starting from HDD1.
52
• TherespectiveharddiskdriveisfaultyintheRAID5orRAID6
mode.
In the RAID5 mode, the indicator respective to the HDD that
failed first will light red and the indicators for the other failed
HDD will blink red. In the RAID 6 mode, the HDD access indi-
cators corresponding to the first and second faulty disks will
light and blinks for the third and subsequent faulty disks.
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Cannot recover data after
replacing the HDD units
when operating in the RAID
5/RAID6mode.
• MakesurethattheHDDunitisinsertedallthewayintothe
HDD slot.
52
• Theharddiskdriveonwhichthereisdatatoberecoveredis
faulty.
–
• Checkifthecapacityofthenewharddiskdriveissmallerthan
the original one's.
If different models are used together even when the capacities
of them are the same, the available capacity may be a few per-
cent smaller. When using multiple hard disk drives, use the
same model. Replacing to a hard disk drive whose capacity is
larger than the original one's is also available.
128
The HDD status indicator
lights orange and red alter-
nately even when any
recording or playback is not
being performed.
• MakesurethatrecoveryofdataintheRAID5/RAID6modeis
not being processed.
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