I've had this Cavalry 4TB RAID drive connected via eSATA to a Win2003 box for a year or two, and it's not coming up any more (can't see it in Explorer, or in disk management). I've also tried connecting it directly to a Win7 laptop and no dice.
It's configured as RAID-5. I'm guessing either one of the drives has gone bad, or there's a problem with the Cavalry hardware.
Where do I start diagnosing this?