Im researching the process of how to take external raid array drives that are currently formatted for the mac system and and converting the drives to a format that can be used with a pc. I was informed by an expert that there is a simple process, but never got the details.
I have absolutely no idea what the performance penalty is of using Jeff's suggestion of MacDrive, but normally one would reformat from Windows with NTFS and thus lose all data currently on the raid. But, about the same as with editors, FCP uses ProRes and Adobe uses native format. Well here the choice is similar, either use MacDrive (similar to ProRes) or use NTFS (similar to native).
I think Eric B. once mentioned in conversation that there was a very easy way to reformat the mac formatted drives to pc (NTFS) while they weere still connected to the mac. So they would be ready for use when "plugged" in to the PC. I may have misinterpreted him, but this was my understanding.
Essentially the easy way to do this is to delete the raid volume while it's on the Mac and then connect the raid to the PC and create a new raid volume. After it initializes then you just initialize the volume in Windows as GPT and format the Volume as NTFS. Once you have the Driver installed for the controller in Win 7 you can also delete the raid volume on the PC system and then just create the new raid then.
This COW thread:
seems to indicate that you can do it with something called Configurator. Windows 7 64-bit supports GUID partition tables, so multi-TB sized disks aren't a problem.
EDIT: Even after a refresh, Eric still beat me to the punch.