1 .TH MULTIPATH 8 "February 2004" "" "Linux Administrator's Manual"
3 multipath \- Device mapper target autoconfig
13 .BR failover | multibus | group_by_serial | group_by_prio | group_by_node_name \|]
18 is used to detect multiple paths to devices for fail-over or performance reasons and coalesces them
22 verbosity, print all paths and multipaths
29 print the created or updated multipath names only, for use to feed other tools like kpartx
32 print all info : detected paths, coalesced paths (ie multipaths) and device maps
36 dry run, do not create or update devmaps
39 list the current multipath configuration
43 multipath target param: polling interval
45 .BI \-D " major:minor"
46 update only the devmap the path pointed by
51 flush all the multipath device maps
54 force maps to specified policy:
58 1 path per priority group
61 all paths in 1 priority group
64 1 priority group per serial
67 1 priority group per priority value. Priorities are determined by callout programs specified as a global, per-controler or per-multipath option in the configuration file
70 1 priority group per target node name. Target node names are fetched in /sys/class/fc_transport/target*/node_name.
74 do not send signal to multipathd. -d activate this silently.
77 update only the devmap the path pointed by
81 is in the /dev/sdb (as shown by udev in the $DEVNAME variable) or major:minor format.
83 may alternatively be a multipath mapname
90 was developed by Christophe Varoqui, <christophe.varoqui@free.fr> and others.