tree 9a073e2360afebe6485ac3a78c796627fc9e80b2
parent 4d89b7b4e4726893453d0fb4ddbb5b3e16353994
author Hannes Reinecke <hare@suse.de> 1245661931 +0100
committer Alasdair G Kergon <agk@redhat.com> 1245661931 +0100

dm mpath: change attached scsi_dh

When specifying a different hardware handler via multipath
features we should be able to override the built-in defaults.

The problem here is the hardware table from scsi_dh is compiled
in and cannot be changed from userland. The multipath.conf OTOH
is purely user-defined and, what's more, the user might have a valid
reason for modifying it.
(EG EMC Clariion can well be run in PNR mode even though ALUA is
active, or the user might want to try ALUA on any as-of-yet unknown
devices)

So _not_ allowing multipath to override the device handler setting
will just add to the confusion and makes error tracking even more
difficult.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>