Initialize will format the RAID volume (create). If you already have information on your Hard Disk Drives, it is better to create a backup first. The chipset SATA mode in the BIOS needs to be on RAID.
Intel® Rapid Storage Technology (User Guide)
I have just read the user guide but this is also unclear to me. If I have an existing mirror raid 1 with data, but not the OS, and the volume has not been initialised ie because I created it in the BIOS rather than the Windows gui.
If I subsequently initialise the raid volume from the irst application doesn't delete the existing data ?
obviously I will make a backup but I would like to know the answer to this question.