multipath config

# This is a basic configuration file with some examples, for device mapper
# multipath.
# For a complete list of the default configuration values, see
# /usr/share/doc/device-mapper-multipath-0.4.7/multipath.conf.defaults
# For a list of configuration options with descriptions, see
# /usr/share/doc/device-mapper-multipath-0.4.7/multipath.conf.annotated


# Blacklist all devices by default. Remove this to enable multipathing
# on the default devices.
#blacklist {
#        devnode "*"
#}

#blacklist {
 #      devnode "sdc"
#}

## By default, devices with vendor = "IBM" and product = "S/390.*" are
## blacklisted. To enable mulitpathing on these devies, uncomment the
## following lines.
#blacklist_exceptions {
#       device {
#               vendor  "IBM"
#               product "S/390.*"
#       }
#}

## Use user friendly names, instead of using WWIDs as names.
defaults {
        user_friendly_names yes
}
##
## Here is an example of how to configure some standard options.
##
#
#defaults {
#       multipath_tool  "/sbin/multipath -v0"
#       udev_dir        /dev
#       polling_interval 10
#       default_selector        "round-robin 0"
#       default_path_grouping_policy    failover
#       default_getuid_callout  "/sbin/scsi_id -g -u -s /block/%n"
#       default_prio_callout    "/bin/true"
#       default_features        "0"
#       rr_min_io              100
#       failback                immediate
#}
defaults {
       udev_dir                /dev
       polling_interval        10
       selector                "round-robin 0"
       path_grouping_policy    multibus
       getuid_callout          "/sbin/scsi_id -g -u -s /block/%n"
       prio_callout            /bin/true
       path_checker            readsector0
       rr_min_io               100
       max_fds                 8192
       rr_weight               priorities
       failback                immediate
       no_path_retry           fail
}