Thanks David.
I think option one will have to do then. The HBA was originally bought with a battery backed cache but that controller failed, was replaced and I am not sure if the new controller has one. However the data on the d2600 array is replicated data and not the original copy (the data is primarily video and stills). Funny enough, the original data is stored on a P2000 FC in our office.
Thanks for clearing that up. I will do some more reading on the P2000's capabilities. It will be useful.
Dermot.