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 configured.
• A drive is not formatted.
Flashes green every 2
seconds
The NAS is in S3 sleep mode.
Green
The NAS is ready.
Off
All drives are in standby mode.
LAN
Orange
A read/write error occured while another device is
accessing data.
Flashes orange
The NAS is being accessed from the network.
Drive
Flashes red
The data is being accessed and a read/write error occurs
during the process.
Red
A drive read/write error occured.
Flashes green
The data is being accessed.
Green
The drive can be accessed.
TS-453BT3 User Guide
Basic Operations
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