# 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-0.4.9/multipath.conf.defaults# For a list of configuration options with descriptions, see# /usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf.annotated## REMEMBER: After updating multipath.conf, you must run## service multipathd reload## for the changes to take effect in multipathd## 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 {#	udev_dir		/dev#	polling_interval 	10#	path_selector		"round-robin 0"#	path_grouping_policy	multibus#	getuid_callout		"/lib/udev/scsi_id --whitelisted --device=/dev/%n"#	prio			alua#	path_checker		readsector0#	rr_min_io		100#	max_fds			8192#	rr_weight		priorities#	failback		immediate#	no_path_retry		fail#	user_friendly_names	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 26353900f02796769#	devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"#	devnode "^hd[a-z]"#}#multipaths {#	multipath {#		wwid			3600508b4000156d700012000000b0000#		alias			yellow#		path_grouping_policy	multibus#		path_checker		readsector0#		path_selector		"round-robin 0"#		failback		manual#		rr_weight		priorities#		no_path_retry		5#	}#	multipath {#		wwid			1DEC_____321816758474#		alias			red#	}#}#devices {#	device {#		vendor			"COMPAQ  "#		product			"HSV110 (C)COMPAQ"#		path_grouping_policy	multibus#		getuid_callout          "/lib/udev/scsi_id --whitelisted --device=/dev/%n"#		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#	}#}