Installing a new Hard Drive in a HP ProLiant ML310 G4 server

[TTr]

Check if there is any other raid management software installed. I remember a raid management software that was a predeccessor to ACU that managed some embedded SATA raid cards.

As an alternative you can check the LSI web site and download their management software.

This and many other HP disk storage cards are rebranded LSI cards. Yours looks like this one

http://www.lsi.com/storage_home/products_home/host_bus_adapters/sas_hbas/internal/sas3080x-r/index.html

Now, do these people have a test server? It seems to me for a critical environment like the one you described, they should have a spare server or a test environment to allow for testing patch installation, software upgrades etc.