I have a Windows Storage Spaces mirror (two drives) formatted as NTFS on my desktop with all onboard SATA controllers used. I would like to replace these drives and then selectively copy data from one of them attached to an external SATA->USB adapter.

What should I know before attempting this? I know that when it's a single drive that attaching it by USB "just works" but I've never tried doing this with a drive that was used on a Storage Spaces mirror. Is there a special process that is required to import the disk so that it can been seen by the system or will it detect and work automatically? I want to figure out a process before I actually disconnect either of these disks to minimize any problems.