ASUS P5W and external Firewire-Harddisc

[case11]

Hi folks,

 

I am using an ASUS P5W and all is running fine, except of my external 500 GB harddisc (Firewire). Time Machine doesn't start and tells me that the harddisc could not be found (_CFGetHostUUIDString: unable to determine UUID for host), also SuperDuper! (backup medium cannot be erased) doesn't work.

 

I can manually add folders and files to the disc, but the above programs cannot use it. :-(

 

System is:

Kalyway 10.5.2, Vanilla, EFI v8

 

thank you for answers,

case