LEDs
LEDs indicate the system status and related information when the device is powered on. The following LED
information applies only when the drive is correctly installed and when the device is connected to the
network or to a host.
For details on the location of the LEDs, see
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 cord or USB cable, and do not
force-exit the application.
Red
• The drive is invalid.
• The shared folder has reached its full capacity.
• The shared folder 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 NAS is starting up.
• The device is not configured.
• A drive is not formatted.
Green
The device is ready.
Off
• All drives are in standby mode.
• The device is powered off.
TS-hx77XU-RP User Guide
Basic Operations
58