I have the same issue with a 'ERROR OCCURRED (0)' in the BIOS Intel RST screen on my RAID-0 Stripe, but my system is still functioning [mostly] normally. The only difference is I am running Windows 8.1 and there doesn't seem to be a Intel RST app for Windows 8+. This is the ONLY thread I've found anywhere on the Internet that was even close to my issue.
Earlier this week, my system started to lag and freeze for a bit before working again. This definitely seemed like a hardware issue, and sure enough, I noticed the drive error during boot, though the RAID volume status is normal. I purchased a replacement drive and was able to capture a system image to restore once the RAID array is rebuilt.
Are there any Intel tools to determine exactly what the error is? Perhaps the drive is recoverable and usable? (though I wouldn't re-use it for this purpose) Or would I have to break apart the RAID array and use a tool from the drive OEM?