Well, it would be nice to know a few more things. Such as, are these SATA drives or PATA drives? What is the make and model number of the computer? Or if homemade, what is the mobo model number, and what bios is being used?
It seems you can find this out in the manual.
But basically it probably means changing a setting in the BIOS, and then entering the RAID part of the BIOS at boot up (usually you will be told how on your screen during bootup). Once you enter the control, you can then set up a RAID array. The data from the first hard drive will pretty much just be copied into the second drive for a RAID 1 array.
EDIT: and there probably is a driver that needs to be installed.
Edited by Albert Frankenstein, 10 July 2006 - 08:26 PM.