we use external hdd in the same condition -- for data backup, and i got the same error message.
The difference is that i used a HDD Box to hold my raided hard disks.
I solved the problem this way:
Set the hibernate/sleep time of HDD Box to 0, ie, to disable hibernation.
I got a tool from the HDD Box Provider, and configure the HDD Box under Windoze.
Hope it helps.
Last edited by yyu; 08-31-2012 at 05:37 AM.