LED
Status
Description
Status
Flashes green and red
alternately 2 times per
second
• A drive on the NAS is being formatted.
• The NAS is being initialized.
• The operating system is being updated.
• RAID rebuild is in process.
• Online RAID Capacity Expansion is in process.
• Online RAID Level Migration is in process.
Green
The NAS is ready.
Flashes green 2 times per
second
• The NAS is not configured.
• A drive on the NAS is not formatted.
Red
• The drive is invalid.
• A disk volume has reached its full capacity.
• A 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 is detected on a 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 2 times per
second
The NAS is in degraded mode (one member drive failed in
RAID 1, RAID 5, or RAID 6).
Flashes Red once
The NAS has received a command from a remote control.
Flashes Amber
The NAS is in sleep mode (S3).
Off
All drives are in standby mode.
Gigabit LAN
(Front)
Amber
The NAS is connected to a network.
Flashes Amber
The NAS is being accessed from the network.
Off
The NAS is not connected to a network.
Gigabit LAN
(Rear)
Left Green
The Ethernet port is connected to a 1 gigabit network.
Left Amber
The Ethernet port is connect to a 100 megabit network.
Left Off
The NAS is not connected to a network.
Right Green
The Ethernet port is connected to a network.
Right flashes Green
The NAS is being accessed on this Ethernet port.
Right Off
The Ethernet port is not connected to a network.
TS-x53BU User Guide
Basic Operations
40