As you may have read I am currently implementing VMWare vSphere 4 on several HP Proliant DL380 G7 machines.

I ran across an interesting knowledge base article from VMWare that describes a possible issue that is summarized as “Power on and storage operations are slow with the HP Smart Array P410i controller“.

Essentially this just means a performance issue and the resolution is to install an extra (256 MB) cache module on the RAID controller.

The Cache Module has HP article # 462968-B21 (not to be confused with 462969-B21 which is the Battery Kit).

Google search on 462968-B21.