4.2 Disk Information Indicators on Various HDD Modes
The left and right hard disk drives have their own set of LEDs that show the
system states. The following table shows the different HDD modes and their
indications.
LED Indicators
HDD
Mode
Device State
Connected
to AC
Power
Status
(Blue)
Access
(Red)
Idle Yes
On
Off
LNR
Read/write activity
Yes
On
Blink
Idle No
Blink
Blink
Idle Yes
On
Off
Read/write activity
Yes
On
Blink
BIG
RAID 0
RAID 1
Error: incorrect serial number or,
one or more bad partial volumes
Yes Blink
Blink
Disk rebuild (a physical partition is
being rebuilt)
Yes Blink
On
RAID 1
Disk rebuild (a physical partition is
being verified)
Yes On
Flash
NOTE: The easiest way to tell the difference between a blinking LED and a flashing LED is
that flashing stops when the read/write activity is finished, and blinking does not stop. The
blink rate is slower too, but the difference in speed is more difficult to detect visually.
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