To display the multipathing information on a system

• Use the vxdisk path command to display the relationships between the device paths, disk access names, disk media names and disk groups on a system as shown here:

  # vxdisk path

  SUBPATH      DANAME     DMNAME     GROUP    STATE
  sda          sda        mydg01     mydg     ENABLED
  sdi          sdi        mydg01     mydg     ENABLED
  sdb          sdb        mydg02     mydg     ENABLED
  sdj          sdj        mydg02     mydg     ENABLED
   .
   .
   .

  This shows that two paths exist to each of the two disks, mydg01 and mydg02, and also indicates that each disk is in the ENABLED state.

To view multipathing information for a particular metadevice

1. Use the following command:

   # vxdisk list devicename

   For example, to view multipathing information for the device sdl, use the following command:

   # vxdisk list sdl

   Typical output from the vxdisk list command is as follows:

   Device:    sdl
   devicetag: sdl
   type:      sliced
   hostid:    zort
   disk:      name=mydg04 id=962923652.362193.zort
   group:     name=mydg id=962212937.1025.zort
   flags:     online ready private autoconfig autoimport imported
   pubpaths:  block=/dev/vx/dmp/sdl3 char=/dev/vx/rdmp/sdl3
   privpaths: block=/dev/vx/dmp/sdl5 char=/dev/vx/rdmp/sdl5
   version:   2.2
   iosize:    min=512 (bytes) max=16 (blocks)
   public:    slice=3 offset=0 len=16450497
   private:   slice=5 offset=1 len=2049
   update:    time=962923719 seqno=0.7
   headers:   0 248
   configs:   count=1 len=1488
   logs:      count=1 len=225
   Defined regions:
   config   priv 000017-000247[000231]: copy=01 offset=000000 
   enabled
   config   priv 000249-001505[001257]: copy=01 offset=000231 
   enabled
   log      priv 000745-000854[000110]: copy=01 offset=000000 
   enabled
   Multipathing information:
   numpaths:   2
   sdl   state=enabled     type=secondary
    sdp   state=disabled    type=primary

   In the Multipathing information section of this output, the numpaths line shows that there are 2 paths to the device, and the following two lines show that one path is active (state=enabled) and that the other path has failed (state=disabled).

   The type field is shown for disks on Active/Passive type disk arrays such as the EMC CLARiiON, Hitachi HDS 9200 and 9500, Sun StorEdge 6xxx, and Sun StorEdge T3 array. This field indicates the primary and secondary paths to the disk.

   The type field is not displayed for disks on Active/Active type disk arrays such as the EMC Symmetrix, Hitachi HDS 99xx and Sun StorEdge 99xx Series, and IBM ESS Series. Such arrays have no concept of primary and secondary paths.

2. Alternately, you can use the following command to view multipathing information:

   # vxdmpadm getsubpaths dmpnodename=devicename

   For example, to view multipathing information for emc_clariion0_893, use the following command:

   # vxdmpadm getsubpaths dmpnodename=emc_clariion0_893

   Typical output from the vxdmpadm getsubpaths command is as follows:

   NAME     STATE[A]   PATH-TYPE[M] CTLR-NAME  ENCLR-TYPE   ENCLR-NAME     ATTRS
   ==============================================================================
   sdbc     ENABLED(A)  PRIMARY      c3        EMC_CLARiiON  emc_clariion0     -
   sdbm     ENABLED     SECONDARY    c3        EMC_CLARiiON  emc_clariion0     -
   sdbw     ENABLED(A)  PRIMARY      c3        EMC_CLARiiON  emc_clariion0     -
   sdck     ENABLED(A)  PRIMARY      c2        EMC_CLARiiON  emc_clariion0     -
   sdcu     ENABLED     SECONDARY    c2        EMC_CLARiiON  emc_clariion0     -
   sdde     ENABLED(A)  PRIMARY      c2        EMC_CLARiiON  emc_clariion0     -