We have had problems reassembling / resyncing RAID arrays because one stubborn drive pops out and fails too easily (we run two parity drives - so if you are already down 2 drives a 3rd stubborn drive is a bummer). If the drive would just stay in and try harder,
IMO that drive should get shredded at the first sign of trouble (ideally, you'd be getting SMART alerts pre-fail at least some of the time). But of course it's very common for multiple drives in an array to fail within a short time window, due to shared environmental problems. I'd call 2 drives failure in a short window a signal that it's time to replace the server and re-sync its data to the other copies.
But until we reassemble the RAID array and get the file system back online, we can't even check what we are holding
Except for the synchronous copy on the other server(s), right? And the async off-site copies for any data that you've had for a little while?