The problem is that the file system on the RAID's volume was damaged, probalbly, the disk cache wasn't properly flashed to the disk during shut off. That quite often happens in Windows 7.
You may use Restorer Ultimate
. First, scan the RAID's volume as it is now and see what can be found on it. If that proves unsuccessful, you'll have to disassemble the RAID and create virtual RAID, as it's shown in the help:Basic RAID 4 and RAID 5