Are any of the drives SATA or are all of the mentioned ones PATA? What format and layout are all the current partitions (FAT, FAT32, NTFS, etc.) on your drives.
If you have a tool like VCom's Partition Commander (I got my legit copy cheap on eBay), you can remove your current boot drive, move the 80g drive to the connection where the 40G is now, connect one of the 320s to where the 80 is now, boot off the P-C CD and set up your 320GB drive and move the data to the one 320GB drive. Then wipe the 80GB drive using P-C. Shut down and put the 80G back on the connector where it was as well as the 40G back where it was. Boot up again on the P-C CD and move whats on the 40 over to the 80 using P-C.
Shut down again, move the 80 to where the 40 is and hook the 320 up to where the 80 is. Then boot up into Win off the 80 and make sure everything works as before but with the 80/320 combo in place. Once you're sure everything is working as before, set up your mirror (RAID-1) drive against the 320 that's in place.
I would also use your other 320 prior to setting up the mirror to backup everything off the current 40/80 combo for protection during all the data moving, etc. Once you have the 80/320 working as before, wipe the backup data off the second 320 and set up the mirror.
As long as you keep booting off the P-C CD during the tranfer processes, Windwoes shouldn't screw up any of its bookkeeping. Make sure that your system will boot from the P-C CD before disconnecting anything or you'll be wasting your time. IOW, make sure the boot order is set correctly in your BIOS. My boot order is set to: FD, CD, HD1.
Tip: install the latest RAID drivers for your chipset before doing any of the transfers so it'll be already to go when all the transfers are done and you are ready to do the mirror.
Tip: Be sure to study up on your particular RAID configuration, both what is available in your BIOS and what the RAID control panel software (usually part of the drivers) offers. Go to your mobo and chipset mfr's web sites and check for any FAQs and Tips for your particular setup. There may be mobo BIOS updates that need to be done for optimum RAID function (part of which resides in the mobo BIOS), manual updates/corrections for the RAID functions, etc. etc. Additional info on the chipset mfr's site. Use whatever resources are available to you for a successful outcome.
Hope someone who has done similar with your same equipment will chime in. My advice is on a conceptual basis rather than specific to your hardware.
Good luck.
.bh.
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