The biggest, most important thing I can say here is that you must always backup your important data. Setting your 2-drive ShareSpace to RAID 0 will double the potential failure rate of the group of drives.
Specifically in your case, burn the Fedora Core 14 CD, then shut your computer down. Attach both drives (your data are spread across both drives and without both working drives you cannot access or retrieve any data), then power on the computer and boot from the Fedora CD. Give it some time to boot, and eventually you’ll see a GNOME session running with a blue desktop and panels on the top and bottom of the screen.
If everything works, you should be able to click on the Places menu on the top panel, then choose NASRAID in the list of places and filesystems. If it mounts, a file manager window will come up and you can double-click on Public or your other shares. At this point in time you will need to copy _ ALL _ of your data onto another hard drive. That’s also a great time to copy it it to two hard drives so you have a backup.
Once that’s finished, use the Data Lifeguard Diagnostic tool to run extended tests on the two drives, then if they pass, write zeros to the disks (full erase, not quick erase). Assuming no errors occured, you can put both drives back into your ShareSpace, at which point your ShareSpace will reinitialize everything and after several hours will be fully operational again.
If you do encounter any errors, simply create an RMA for the failed drives themselves.
Best of luck!