My Passport Studio keeps blinking with mac powered off

When connected with firewire the device keeps blinking when the system is in sleep mode or powered off.

I have to unplug the cable to stop it.

Is it a normal behaviour? How to avoid it?

Thanks

Carlo

Hi carlovanoni, see if the following link helps.

A WD external drive connected to a Mac system via FireWire does not resume operation from sleep mode or start-up

http://wdc.custhelp.com/app/answers/detail/a_id/1697