LED
Status
Description
System status
Flashes green and red
alternately every 0.5
seconds
• A 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
• A drive is invalid.
• A shared folder has reached its full capacity.
• A shared folder is about to reach its full capacity.
• A 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).
Green
The device is ready.
Flashes green every 0.5
seconds
• The device is not configured.
• A drive is not formatted.
Off
• All drives are in standby mode.
• The device is powered off.
Drive activity
Flashes red
Data is being accessed, and during the process a drive
read/write error occurred.
Red
A drive read/write error occurred.
Flashes green
Data is being accessed.
Green
The drive is ready.
Off
No drive was detected.
TS-hx90FU User Guide
Basic Operations
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