[dm-devel] [PATCH 16/18] multipath-tools: Use ALUA for HP 3PAR

[Sebastian Herbszt]

Xose Vazquez Perez wrote:
> Original patch from Hannes Reinecke <hare at suse.de>:
> 
> .vendor = "3PARdata",
> .product = "VV",
> .features = DEFAULT_FEATURES,
> - .hwhandler = DEFAULT_HWHANDLER,
> - .pgpolicy = MULTIBUS,
> - .pgfailback = FAILBACK_UNDEF,
> + .hwhandler = "1 alua",
> + .pgpolicy = GROUP_BY_PRIO,
> + .pgfailback = -FAILBACK_IMMEDIATE,
> .rr_weight = RR_WEIGHT_NONE,
> - .no_path_retry = NO_PATH_RETRY_UNDEF,
> - .checker_name = DEFAULT_CHECKER,
> - .prio_name = DEFAULT_PRIO,
> + .no_path_retry = 18,
> + .checker_name = TUR,
> + .prio_name = PRIO_ALUA,
> .prio_args = NULL,
> 
> Sebastian was not convinced with this change, full thread: https://marc.info/?t=146175638600002
> But there is no automatic way to change .pgpolicy from MULTIBUS to GROUP_BY_PRIO.
> So we should stick to latest manufacturer's recommendations:

So 'retain_attached_hw_handler' suggested by Hannes doesn't work?

Sebastian