when i switch it on and asks me to install the software for it? I have no idea what it is! I've searched up on it and i presume not every PC has one? It shows as a yellow exclamtion mark in the device manager after this and if i delete it just picks it up again when i boot up. I'm a total newb when it comes to these things and if anyone could reply to me I would be very grateful as to why my pc picks this up.
of you dont use it you could disable it in the bios. if you want a driver for it go to your mobo makers website and get the driver, or you could try microsoft via the windows update in the all programs list.
most newwer mobos have them but not all. raid is way of combining more than one harddrive together into an array. it (the controler) can then either mirror the data, this is were both hds have the same data on them (avoids any data loss if one drive fails) but you only get half of the space. eg your 2 250gb hds will both have the same data on so you only have 250gb of space, or striped were the contoller splits the data between them both making it work fatser than if the drives were used as single drives, this way you get the full 500gb from your 2 250gb drives but if one fails you lose all the data on both as you need both drives working to complete the file(risky but gives better performance). finaly some can do both at the same time but then you need even more hard drives. thats a brief way of how it works and there is a bit more to it, wikipedia might be able to give you more info if you need it.
