RedHat Linux 7 multipath.conf for P9500 and HP Storeserve

[A.W.R]

HI,

We are installing Red Hat Linux v7 that is connected to a P9500 and HP Storserve storage. Is there a guidline on the multipath.conf file that we can use, or guidelines on what needs to be set up on the P9500, or Storage?

Thanks

Andrew

[Alzhy]

IIRC, the "defaults" in the multipath configuration are already sufficient for optimal Enterprise Server Configuration for Enterprise Class Storage arrays like the P9500 (aka Hitachi VSP) and your 3PAR array.

Check the defaults in /usr/share/doc/device-mapper-multipath-x.y.z/multipath.conf.defaults

Example:

#       device {
#               vendor "HP"
#               product "OPEN-.*"
#               path_grouping_policy multibus
#               getuid_callout "/lib/udev/scsi_id --whitelisted --device=/dev/%n"
#               path_selector "round-robin 0"
#               path_checker tur
#               features "0"
#               hardware_handler "0"
#               prio const
#               rr_weight uniform
#               no_path_retry 18
#               rr_min_io 1000
#               rr_min_io_rq 1
#       }

and

#       device {
#               vendor "HITACHI"
#               product "OPEN-.*"
#               path_grouping_policy multibus
#               getuid_callout "/lib/udev/scsi_id --whitelisted --device=/dev/%n"
#               path_selector "round-robin 0"
#               path_checker tur
#               features "0"
#               hardware_handler "0"
#               prio const
#               rr_weight uniform
#               no_path_retry 6
#               rr_min_io 1000
#               rr_min_io_rq 1
#       }

You need not really even need to tweak anything except if you do multipath aliasing and ownerships..