Experimenting shows that we can have the older config values side by side with the new ones. e.g.
... prio_callout /sbin/mpath_prio_alua /dev/%n prio alua ...
multipath doesn't have a rigid config file format, it seems to slurp symbols and then seek the key/value pair out on demand. In doing this, we can safely downgrade as well.
Experimenting shows that we can have the older config values side by side
with the new ones. e.g.
... prio_alua /dev/%n
prio_callout /sbin/mpath_
prio alua
...
multipath doesn't have a rigid config file format, it seems to slurp symbols
and then seek the key/value pair out on demand. In doing this, we can safely
downgrade as well.