Ghost really slow on Dell R610's

Hi,

I have a Dell R610 server, the server has A SAS 6/iR controller with SAS disks able to sustain high transfer speeds under windows.

When booting using our PCDOS Ghost boot disk to create (and later restore) some images transfer speeds are very very slow. Ghost reports speeds of around 250MB/minute.

I've tried a bunch of things:

- eliminate the network as possible bottleneck by ghosting to a 2nd local disk
- use a WinPE bootdisk
 

But the problem remains.. I'm not sure what to try anymore... My hypothesis is that the SAS control / disks are not handled correctly (driver?) but I would know how to go about fixing that...

Any help is welcome!