LEDs
LEDs indicate system status and related information when the NAS is powered on. The following LED
information applies only when the drive is correctly installed and when the NAS is connected to the
network.
For details on the location of the LEDs, see Components.
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 occured when accessing (read/write) the data.
• A bad sector is 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 congured.
• A drive is not formatted.
Green The NAS is ready.
O All drives are in standby mode.
TVS-x72XT User Guide
Basic Operations 58
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