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LED
Status
Description
System Status
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.
• The firmware is being
updated.
Important
When updating the
firmware, do not remove
the power cable or USB
cable, and do not force-
exit the application.
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.
• The system temperature is
over the threshold.
Flashes red every 0.5 seconds
The NAS is in degraded mode
(one member drive failed in RAID
1).
Flashes green every 0.5 seconds
• The device is starting up.
• The device is not configured.
• A drive is not formatted.
Flashes green every 2 seconds
All drives are in standby mode.
Flashes green every second
The device is not configured.
Green
The device is ready.
Off
• All drives are in standby
mode.
• The device is powered off.
TS-x53DU User Guide
Basic Operations
46