LED
Status
Description
System Status
Flashes green and red alternately
every 0.5 seconds
• The drive is being formatted.
• The NAS is being initialized.
• The operating system is being
updated.
• RAID rebuilding is in progress.
• Online RAID Capacity Expansion is in
progress.
• Online RAID Level Migration is in
progress.
Red
• The drive is invalid.
• The disk volume has reached its full
capacity.
• The disk volume is about to reach its
full capacity.
• The system fan is not functioning.
• An error occurred when accessing
(read/write) the data.
• A bad sector was detected on the hard
drive.
• The NAS is in degraded read-only
mode (two member drives failed in
RAID 5 or RAID 6 but the data can still
be read).
• Hardware self-test error
Flashes red every 0.5 seconds
The NAS is in degraded mode (one
member drive failed in RAID 1, RAID 5, or
RAID 6).
Flashes green every 0.5 seconds
• The NAS is starting up.
• The NAS is not configured.
• A drive is not formatted.
Green
The NAS is ready.
Off
All drives are in standby mode.
Drive
Flashes red
The data is being accessed and a read/
write error occurs during the process.
Red
A drive read/write error occurred.
Flashes green
The data is being accessed.
Green
The drive can be accessed.
TVS-x72N User Guide
Basic Operations
44
