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
  hdisk1       hdisk1     mydg01     mydg     ENABLED
  hdisk9       hdisk9     mydg01     mydg     ENABLED
  hdisk2       hdisk2     mydg02     mydg     ENABLED
  hdisk10      hdisk10    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 hdisk18, use the following command:

   # vxdisk list hdisk18

   Typical output from the vxdisk list command is as follows:

   Device:    hdisk18
   devicetag: hdisk18
   type:      simple
   hostid:    zort
   disk:      name=mydg04 id=962923652.362193.zort
   timeout:   30
   group:     name=mydg id=962212937.1025.zort
   info:      privoffset=128
   flags:     online ready private autoconfig autoimport imported
   pubpaths:  block=/dev/vx/dmp/hdisk18 
   privpaths: char=/dev/vx/rdmp/hdisk18
   version:   2.1
   iosize:    min=1024 (bytes) max=64 (blocks)
   public:    slice=0 offset=1152 len=4101723
   private:   slice=0 offset=128 len=1024
   update:    time=962923719 seqno=0.7
   headers:   0 248
   configs:   count=1 len=727
   logs:      count=1 len=110
   Defined regions:
   config   priv 000017-000247[000231]:copy=01 offset=000000 
   disabled
   config   priv 000249-000744[000496]:copy=01 offset=000231 
   disabled
   log      priv 000745-000854[000110]:copy=01 offset=000000 
   disabled
   lockrgn  priv 000855-000919[000065]: part=00 offset=000000
   Multipathing information:
   numpaths:   2
   hdisk18 state=enabled  type=secondary
   hdisk26 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_17, use the following command:

   # vxdmpadm getsubpaths dmpnodename=emc_clariion0_17

   Typical output from the vxdmpadm getsubpaths command is as follows:

   NAME       STATE[A]   PATH-TYPE[M] CTLR-NAME  ENCLR-TYPE   ENCLR-NAME     ATTRS
   ================================================================================
   hdisk107   ENABLED(A)  PRIMARY     fscsi1     EMC_CLARiiON  emc_clariion0     -
   hdisk17    ENABLED     SECONDARY   fscsi0     EMC_CLARiiON  emc_clariion0     -
   hdisk2     ENABLED     SECONDARY   fscsi0     EMC_CLARiiON  emc_clariion0     -
   hdisk32    ENABLED(A)  PRIMARY     fscsi0     EMC_CLARiiON  emc_clariion0     -