multipath-tools/multipath.conf

   1 # This is a basic configuration file with some examples, for device mapper
   2 # multipath.
   3 # For a complete list of the default configuration values, see
   4 # /usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf.defaults
   5 # For a list of configuration options with descriptions, see
   6 # /usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf.annotated
   7
   8 ## By default, devices with vendor = "IBM" and product = "S/390.*" are
   9 ## blacklisted. To enable mulitpathing on these devies, uncomment the
  10 ## following lines.
  11 #blacklist_exceptions {
  12 #       device {
  13 #               vendor  "IBM"
  14 #               product "S/390.*"
  15 #       }
  16 #}
  17
  18 ## Use user friendly names, instead of using WWIDs as names.
  19 defaults {
  20         user_friendly_names yes
  21 }
  22 ##
  23 ## Here is an example of how to configure some standard options.
  24 ##
  25 #
  26 #defaults {
  27 #       udev_dir                /dev
  28 #       polling_interval        10
  29 #       selector                "round-robin 0"
  30 #       path_grouping_policy    multibus
  31 #       getuid_callout          "/lib/udev/scsi_id --whitelisted --device=/dev/%n"
  32 #       prio                    alua
  33 #       path_checker            readsector0
  34 #       rr_min_io               100
  35 #       max_fds                 8192
  36 #       rr_weight               priorities
  37 #       failback                immediate
  38 #       no_path_retry           fail
  39 #       user_friendly_names     yes
  40 #}
  41 ##
  42 ## The wwid line in the following blacklist section is shown as an example
  43 ## of how to blacklist devices by wwid.  The 2 devnode lines are the
  44 ## compiled in default blacklist. If you want to blacklist entire types
  45 ## of devices, such as all scsi devices, you should use a devnode line.
  46 ## However, if you want to blacklist specific devices, you should use
  47 ## a wwid line.  Since there is no guarantee that a specific device will
  48 ## not change names on reboot (from /dev/sda to /dev/sdb for example)
  49 ## devnode lines are not recommended for blacklisting specific devices.
  50 ##
  51 #blacklist {
  52 #       wwid 26353900f02796769
  53 #       devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
  54 #       devnode "^hd[a-z]"
  55 #}
  56 #multipaths {
  57 #       multipath {
  58 #               wwid                    3600508b4000156d700012000000b0000
  59 #               alias                   yellow
  60 #               path_grouping_policy    multibus
  61 #               path_checker            readsector0
  62 #               path_selector           "round-robin 0"
  63 #               failback                manual
  64 #               rr_weight               priorities
  65 #               no_path_retry           5
  66 #       }
  67 #       multipath {
  68 #               wwid                    1DEC_____321816758474
  69 #               alias                   red
  70 #       }
  71 #}
  72 #devices {
  73 #       device {
  74 #               vendor                  "COMPAQ  "
  75 #               product                 "HSV110 (C)COMPAQ"
  76 #               path_grouping_policy    multibus
  77 #               getuid_callout          "/lib/udev/scsi_id --whitelisted --device=/dev/%n"
  78 #               path_checker            readsector0
  79 #               path_selector           "round-robin 0"
  80 #               hardware_handler        "0"
  81 #               failback                15
  82 #               rr_weight               priorities
  83 #               no_path_retry           queue
  84 #       }
  85 #       device {
  86 #               vendor                  "COMPAQ  "
  87 #               product                 "MSA1000         "
  88 #               path_grouping_policy    multibus
  89 #       }
  90 #}