Thanks very much for the replies!
This is the error message when booting:
Since posting I've been reading over this chart and from what I can make out it does need the module installed.
http://h18004.www1.hp.com/products/servers/proliantstorage/arraycontrollers/index.html
Hello there,
I've just recently purchased a N54L and I've also got my hands on an HP P420 (With no cache module) (Firmware Revision 1.28).
I've been told that you can use the P420 without the module however I'm getting the following error message:
The controller is disabled because the cache...