An explanation of terms used on this page can be found here.
If RAID cohesion is lost (if the disks in the RAID can only be accessed
individually), the data on the RAID will not be accessible. If re-establishing
the RAID is not possible (and usually that's the case; repairing a RAID can
"initialize" the disks and data would be lost), iRecover can be used
to copy the data from the RAID disks. iRecover is capable of determining RAID
parameters on the fly and can then copy the data from the RAID disks to safety.
Please note: if the RAID is still functional but data on the
RAID is not accessible, the problem lies in the volumes on the RAID. In that
case you may be able to repair things (DiskPatch) or copy files from the RAID
to safety (iRecover).