I have one 8TB drive available for storage in my UrBackup installation setup with btrfs. I also have one or two 500GB drives available.
Would I gain any h/w failure protection if the 8TB dies while including a 500GB drive in the btrfs system (thinking of metadata)? Other that the 500GB storage, that is. Do most UrBackup admins build off of 2 or more drives?
You could try to put the main database file here, but it s not that big.
And i don t think you d get that much speed from it, so i guess the answer is no; because you d double your failure rate.
But maybe it still interesting to benchmark that setup.