I've got a WD MyBook external HDD that seems to be disappearing from the machine every now and then.. Some times a machine reboot will sort it out, other times it can be a struggle to get it back online.. It is currently connected to Firewire, but it gave me similar problems on USB2 and e-Sata aswell..It is still under warranty - would I be able to send it back to WD for a repair/replacement? I am worried I one day wont be able to bring it back to life, and I've got important home video files stored on it.