LED
Status
Description
Drive
Flashes red
The data is being accessed and a
read/write error occurs during the
process.
Red
A drive read/write error occurred.
Flashes green
The data is being accessed.
Green
The drive can be accessed.
Expansion
Note
The expansion unit LEDs
do not apply to 9-bay
models.
Orange
• A USB JBOD expansion unit
has been detected.
• A SAS JBOD expansion unit
has been detected.
• A REXP expansion unit has
been detected.
Off
No JBOD expansion unit has been
detected.
Beep Alarm
Duration
Frequency
Description
Short beep (0.5 seconds) 1
• The NAS is starting up.
• The NAS is shutting down (software shutdown).
• The user pressed the Reset button.
• The operating system was updated.
3
The user tried to copy the NAS data to the external
storage device from the front USB port, but the data
cannot be copied.
Long beep (1.5 seconds) 3 (every 5 minutes)
The system fan is not functioning.
2
• The disk volume is about to reach its full
capacity.
• The disk volume has reached its full capacity.
• The drives are in degraded mode.
• The user started the drive rebuilding process.
• A drive is plugged in or out.
1
• The NAS was powered off by force shutdown
(hardware shutdown).
• The NAS was powered on successfully and is
ready.
TS-x77XU User Guide
Basic Operations
36
