|I used to own an Asus mboard that had both the built into the main chipset EIDE hard drive controller and another EIDE drive controller that supporteed RAID (four IDE headers)..|
I've used two EIDE drive controller PCI cards that supported RAID (2 IDE headers) .
I presently have a combo SATA / EIDE drive controller PCI-E X1 card that supports RAID. (I got it so I could have more than two EIDE drives connected to a recent mboard that has only 1 EIDE header.)
For all of them, their "bios" loads loads first while booting.
If there is a drive connected to the card or onboard controller that supports RAID, for all of them, the line appears about pressing a key to set up a RAID array and that times out after about 5 seconds.
I've never set up a RAID array because I've never had at least two hard drives to connect to make one, and I'm not interested in them.
There may be some info about RAID arrays that came with your card.
If not, there's lots of info about them on the web.
You can only make RAID arrays with hard drives.
Usually there must be two or more physical hard drives in the array, preferably identical but the same size and max speed will do.
RAID 0 has the number 0 because it has no redundancy - if one drive in the array fails you lose access to the data on all the drives - it's only advantage is it gives you the illusion that the max data transfer rate with two drives in an array is twice as fast as with one drive
There is NO advantage to using a SATA optical (CD or DVD) drive in comparison to an EIDE optical drive, other than convenience (if you wouldn't have enough IDE headers available otherwise, you can connect it to a spare SATA data header). When the drive has the same specs otherwise, the max burst data transfer speed of an optical drive is 66 mbytes/sec because there's a limit to how fast you can spin a disk without it flying apart, and a limit to how densely data can be on one circular track of data on the disk.
The max EIDE hard drive burst data transfer speed is 133 mbytes/sec.
The max SATA (the original SATA) hard drive burst data transfer speed is 150 mbytes/sec.
The max SATA II (most drives these days) hard drive burst data transfer speed is 300
The max SATA III (or SATA 3.0 ; some drives these days) hard drive burst data transfer speed is (more) mbytes/sec.but there aren't many cards that support that yet, and only recent mboards support that. .