Hi,
I have a DELL T40 server and I would like to purchase a RAID controller to create a RAID10 from four disks.

I would like to buy a RAID controller on ebay. I live in UK.

I was thinking about the PERC H310 or PERC H710.
Does this controller need to be in IT mode?
I've seen a few controllers in this mode but don't know what that means.

It is also looking for a server with a four-port network card.
Is it best to buy something from DELL on ebay? Do I have to look at any specific parameters?