"The NAS in a RAID 5 setup WAS my backup."
RAID is not backup for data, that is a common misconception. RAID is protection against single HDD failure.
The options for recovering the data yourself are somewhat limited. You can try software programs that specialize in data recovery on RAID NAS devices (like UFS Explorer, costs around 50$ for the liscense) or you can try hooking up the drives to a computer that runs linux.
Message Edited by PCPiranha on 07-01-2009 07:21 PM