rn104 updated to 6.4.0 and possible solution to random lock-ups

Update: Yesterday's problem appears to be solved. 6.4.1RC didn't fix my issue, and it seems to have fixed everyone else's issues so I started to troubleshoot other possibilities. Last week I rotated in a 10 year old disk and it didn't cause any problems until it caused a LOT of problems all at once, so my mind didn't immediately go to that disk. Apparently it was falling behind the rest of the array and causing the RN104 to lock-up. None of my disks have ever been on the "compatability list" and this has never caused me any isses, but for some reason this old drive doesn't play well with the others. It is similarly spec'd, so I'm guessing that it is experiencing some kind of hardware failure that SMART isn't able to pick up.

My appologies for being so alarmed while my crisis was full-swing, and my thanks to all of you for providing such helpful explainations of your issues and solutions. This allowed me to narrow my issue down without waiting on phone support for 11 more hours.

With four fresh (and matching) disks in play, the 6.4.1RC is working well now and moves tons of data with no lock-up.