PE 2650 - Replacement Disk

[Tom Brown]

Hi

We have a very aged 2650 thats well out of warranty but has a failed 
disk that i need to replace. The disks are connected to a PERC3 and the 
failed disk is a 'Ultra 160'

I wonder can i simply replace this with a newer SCA disk or does it have 
to be replaced with a 160 ?

thanks