LED Status Description
System status
and power
Flashes green and red
alternately every 0.5
seconds
• The drive is being formatted.
• The device 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 is detected on the hard drive.
• The device is in degraded read-only mode (two
member drives failed in RAID 5 or RAID 6 but the data
can still be read).
• A hardware self-test error occurred.
Flashes red every 0.5
seconds
The device is in degraded mode (one member drive failed
in RAID 1, RAID 5, or RAID 6).
Flashes green every 0.5
seconds
• The device is not congured.
• A drive is not formatted.
Green The device is ready.
O • All drives are in standby mode.
• The device is powered o.
LAN Orange A network connection has been established.
Flashes orange The device is being accessed from the network.
O The device is not connected to a network.
USB One Touch
Copy
Flashes blue every 0.5
seconds
• A USB device connected to the USB One Touch Copy
port is detected.
• A USB device connected to the front USB port is being
removed from the device.
• A USB device connected to the front USB port is being
accessed.
Blue A USB device is detected in the front USB port.
O • No USB device is detected.
• The NAS has nished copying data to or from the USB
device connected to the front USB port.
TS-x53E User Guide
Basic Operations 35
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