It depends on how your server had the Radi0 array built. Regardless, it isn't the kind of thing that knoppix could easily check for, but I have mounted my raid array several times on knoppix. If your array is built under the LVM (logical volume management) system, the instructions for mounting it at here:
http://www.knoppix.net/wikinew/index.php?title=LVM2
If the array wasn't built with logical volumes, please post back with how it was built, and we may be able to help you get them mounted.
Peace,
JimBass