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LED
System Status
Flashes green and red
alternately every 0.5
seconds
Red
Flashes red every 0.5
seconds
Green
Flashes green every 0.5
seconds
Off
Drive Activity
Flashes red
Red
Flashes green
Green
Off
Status
• 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.
• 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
• A bad sector is detected on the hard drive.
• The device is in degraded read-only mode (two
• A hardware self-test error occurred.
The device is in degraded mode (one member drive failed
in RAID 1, RAID 5, or RAID 6).
The device is ready.
• The device is not configured.
• A drive is not formatted.
• All drives are in standby mode.
• The device is powered off.
The data is being accessed and a read/write error occurs
during the process.
A drive read/write error occurred.
Data is being accessed.
The drive is ready.
No drive was detected.
Description
Important
When updating the firmware, do not remove
the power cord or USB cable, and do not
force-exit the application.
data.
member drives failed in RAID 5 or RAID 6 but the data
can still be read).
TS-h2490FU User Guide
Basic Operations
39
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