1MPATHCONF(8) Linux Administrator's Manual MPATHCONF(8)
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6 mpathconf - A tool for configuring device-mapper-multipath
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9 mpathconf [commands] [options]
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12 mpathconf is a utility that creates or modifies /etc/multipath.conf.
13 It can enable or disable multipathing and configure some common
14 options. mpathconf can also load the dm_multipath module, start and
15 stop the multipathd daemon, and configure the multipathd service to
16 start automatically or not. If mpathconf is called with no commands, it
17 will display the current configuration, but will not create or modify
18 /etc/multipath.conf
19 The default options for mpathconf are --with_module The --with_multi‐
21 pathd option is not set by default. Enabling multipathing will load
22 the dm_multipath module but it will not immediately start it. This is
23 so that users can manually edit their config file if necessary, before
24 starting multipathd.
25 If /etc/multipath.conf already exists, mpathconf will edit it. If it
27 does not exist, mpathconf will use /usr/share/doc/device-mapper-multi‐
28 path-0.4.9/multipath.conf as the starting file. This file has
29 user_friendly_names set. If this file does not exist, mpathconf will
30 create /etc/multipath.conf from scratch. For most users, this means
31 that user_friendly_names will be set by default, unless they use the
32 --user_friendly_names n command.
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35 --enable
36 Removes any line that blacklists all device nodes from the
37 /etc/multipath.conf blacklist section. Also, creates /etc/multi‐
38 path.conf if it doesn't exist.
39 --disable
41 Adds a line that blacklists all device nodes to the /etc/multi‐
42 path.conf blacklist section. If no blacklist section exists, it
43 will create one.
44 --allow <device>
46 Modifies the /etc/multipath/conf blacklist to blacklist all
47 wwids and the blacklist_exceptions to whitelist <device>.
48 <device> can be in the form of MAJOR:MINOR, a wwid, or the name
49 of a device-mapper device, either a multipath device, or any
50 device on stacked on top of one or more multipath devices. This
51 command can be used multiple times to allow multiple devices.
52 NOTE: This action will create a configuration file that mpath‐
53 conf will not be able to revert back to its previous state.
54 Because of this, --outfile is required when using --allow.
55 --user_friendly_name { y | n }
57 If set to y, this adds the line user_friendly_names yes to the
58 /etc/multipath.conf defaults section. If set to n, this removes
59 the line, if present. This command can be used along with any
60 other command.
61 --find_multipaths { y | n }
63 If set to y, this adds the line find_multipaths yes to the
64 /etc/multipath.conf defaults section. If set to n, this removes
65 the line, if present. This command can be used aldong with any
66 other command.
67 --outfile <filename>
69 Write the resulting multipath configuration to <filename>
70 instead of /etc/multipath.conf.
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73 --with_module { y | n }
74 If set to y, this runs modprobe dm_multipath to install the mul‐
75 tipath modules. This option only works with the --enable com‐
76 mand. This option is set to y by default.
77 --with_multipathd { y | n }
79 If set to y, this runs service multipathd start to start the
80 multipathd daemon on --enable, service multipathd stop to stop
81 the multipathd daemon on --disable, and service multipathd
82 reload to reconfigure multipathd on --user_frindly_names and
83 --find_multipaths. This option is set to n by default.
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86 /etc/multipath.conf
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89 multipath.conf(5), modprobe(8), multipath(8), multipathd(8), ser‐
90 vice(8),
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93 Benjamin Marzinski <bmarzins@redhat.com>
94 June 2010 MPATHCONF(8)