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.
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).
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 red once
The device has received a command from
the remote control.
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.
TS-435XeU User Guide
Basic Operations
35