Blinking blue During normal operation, the LED flickers to indicate access to the hard drive.
Slow blinking blue
(10 sec. interval)
The product is in power-saving mode because the host computer is in sleep mode.
See Technical note below.
Fast blinking blue Startup and shutdown
Blinking red (1
sec. interval)
Temperature warning or fan failure.
Solid red Temperature critical or fan absent.
Receiving power
The LaCie d2 powers on automatically when it is:
Connected directly to a computer via the Thunderbolt 3 or USB-C ports. The computer must be
powered on.
Connected to a live power source via the included power supply.
Warning: Some devices may experience false indications of fan failure. When this occurs, the
red LED appears even though there are no problems with the fan. If your device's LED turns red
on one or many occasions, please see this article for more details.
Technical note regarding power-saving mode and Windows: The LaCie d2 can be placed into
power-saving mode on PC’s running Windows 8 or higher. However, it is possible that the LED
will remain off rather than flash blue every 10 seconds.
Important info regarding the ports: The LaCie d2 can be connected to a computer using the USB
3.1 port or the Thunderbolt 3 port. However, it is not possible to connect both ports to a single
computer at the same time or, to connect each port to separate computers.
