I can't seem to find a detailed description of the read-writeback recovery
algorithm. I take it that all STALE plexes always go thru full recovery of
the entire volume. If this is true, then the rwb recovery is used for ACTIVE
plexes. What algorithm is used to determine which plex to read from? If the
read-policy is round-robin, is it possible that the recovery will take bits
from each plex?