No worries. General gist is your computer's looking for a hard drive array when it starts up. If it's still working fine then I won't worry about it.
The quote basically said the guy had two on board (built into the motherboard) network cards, and when he had the RTL network card enabled he got the message, but when he disabled it he didn't. A lot of the other information is because he was trying to install Fedora Linux and this RTL network card looking for an array was causing him problems.
So if you have a network card on your motherboard you could try disabling it if you don't use it. Usually you get into the BIOS configuration by pressing F2 or delete when you turn your computer on, but it does depend on the mother board. It will say "Press <key> to enter config".