20160416 disk read-only issue

 Just an update for anyone who sees this problem in the future.

The apparent cause of this issue was that the array was initializing during filesystem creation. Even though everything in the Adaptec documentation states "you can use the logical drive immediately", this does not appear to be the case. We waited until the array was initialized, then created a new filesystem on the partition. This filesystem passed all the fscks I've thrown at it so far and we've written several terrabytes of data without issue (knock on wood).

in sum: do not create filesystems until the array has finished initializing, no matter what the documentation says. YMMV, etc etc.