Appendix B. DM Multipath Configuration File

# This is a basic configuration file with some examples, for device mapper
# multipath.
#
# For a complete list of the default configuration values, run either
# multipath -t
# or
# multipathd show config
#
# For a list of configuration options with descriptions, see the multipath.conf
# man page

## 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
    find_multipaths yes
}
##
## Here is an example of how to configure some standard options.
##
#
#defaults {
#   polling_interval    10
#   path_selector       "round-robin 0"
#   path_grouping_policy    multibus
#   uid_attribute       ID_SERIAL
#   #prio           alua
#   path_checker        tur
#   rr_min_io       10
#   max_fds         8192
#   rr_weight       priorities
#   failback        immediate
#   no_path_retry       fail
#   user_friendly_names yes
#   find_multipaths     yes
#}
##
## The wwid line in the following blacklist section is shown as an example
## of how to blacklist devices by wwid.  The 2 devnode lines are the
## compiled in default blacklist. If you want to blacklist entire types
## of devices, such as all scsi devices, you should use a devnode line.
## However, if you want to blacklist specific devices, you should use
## a wwid line.  Since there is no guarantee that a specific device will
## not change names on reboot (from /dev/sda to /dev/sdb for example)
## devnode lines are not recommended for blacklisting specific devices.
##
blacklist {
       wwid 3644a84200205ec001d8d87ad30d9610b
    devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
    devnode "^hd[a-z]"
}
multipaths {
    multipath {
        wwid            3648171b7c4abb742729a5562a2f568ad
        alias           redo
    }
    multipath {
        wwid            3648171b7c4ab4741729a2562a2f52844
        alias           fra
    }
    multipath {
        wwid            3648171b7c4ab473d729ac561a2f558dc
        alias           db2
    }
    multipath {
        wwid            3648171b7c4ab973f729af561a2f5087c
        alias           db1
    }

#   multipath {
#       wwid            3600508b4000156d700012000000b0000
#       alias           yellow
#       path_grouping_policy    multibus
#       path_selector       "round-robin 0"
#       failback        manual
#       rr_weight       priorities
#       no_path_retry       5
#   }
#   multipath {
#       wwid            1DEC_____321816758474
#       alias           red
#   }
#}
#   device {
#       vendor          "COMPAQ  "
#       product         "HSV110 (C)COMPAQ"
#       path_grouping_policy    multibus
#       path_checker        readsector0
#       path_selector       "round-robin 0"
#       hardware_handler    "0"
#       failback        15
#       rr_weight       priorities
#       no_path_retry       queue
#   }
#   device {
#       vendor          "COMPAQ  "
#       product         "MSA1000         "
#       path_grouping_policy    multibus
#   }
#}