Manually-Confirgured Software RAID Under NT?

Mandoric asks: "I recently had a RAID-0 array die due to the controller refusing to recognize it as anything but a pair of single drives. Are there any software RAID programs (preferably under NT, as it's an NTFS partition I'd be restoring) that allow manual entry of a preexisting array's stripe size, rather than forcing all stripe data to be rewritten before reading from an array? Or ways to modify the volume data of an existing program to do this?" Are there decent RAID tools, for either NT or for Unix, that will allow one to recover from errors such as this?