Stuck on splash bootup screen?

[Gabb]

So my new system build hasn't encountered any major problems ( everything set at stock temps fine ) until yesterday. When I booted up my system I saw the typical white Gigabyte Z77X U3DH with just one big difference, it never got past this screen and just stayed stuck indefinitely on that screen and didn't load the OS. The error code on the motherboard was A2 which means: "IDE detect" according to the manual. This has only happened once and when I rebooted it a few times everything seemed fine. Should I be worried? What would cause this to hang?