I have an older Dell Studio XPS that I bought with 2-500 gb drives configured by Dell in a RAID 1. I need to increase the size of my disks but in looking at how to do that the instructions are for doing it when you are using IRST and there isn't anything that I've found that tells me what happens to my existing data if I do that upgrade. Will it be destroyed? Will nothing happen? Is IRST just a new front end for IMSM? I've searched for any information on this but I just keep being taken to the page for downloading the IRST update. Can anyone point me to a FAQ for the update at least? Any assistance would be greatly appreciated.