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
  c1t0d0s2     c1t0d0s2   mydg01     mydg     ENABLED
  c4t0d0s2     c1t0d0s2   mydg01     mydg     ENABLED
  c1t1d0s2     c1t1d0s2   mydg02     mydg     ENABLED
  c4t1d0s2     c1t1d0s2   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 c2t0d0s2, use the following command:

   # vxdisk list c2t0d0s2

   Typical output from the vxdisk list command is as follows:

   Device     c2t0d0
   devicetag  c2t0d0
   type       sliced
   hostid     aparajita
   disk       name=mydg01 id=861086917.1052.aparajita
   group      name=mydg id=861086912.1025.aparajita
   flags      online ready autoconfig autoimport imported
   pubpaths   block=/dev/vx/dmp/c2t0d0s4 char=/dev/vx/rdmp/c2t0d0s4
   privpaths  block=/dev/vx/dmp/c2t0d0s3 char=/dev/vx/rdmp/c2t0d0s3
   version    2.1
   iosize     min=512 (bytes) max=2048 (blocks)
   public     slice=4 offset=0 len=1043840
   private    slice=3 offset=1 len=1119
   update     time=861801175 seqno=0.48
   headers    0 248
   configs    count=1 len=795
   logs       count=1 len=120
   Defined regions
   config     priv 000017-000247[000231]:copy=01 offset=000000 
   enabled
   config     priv 000249-000812[000564]:copy=01 offset=000231 
   enabled
   log        priv 000813-000932[000120]:copy=01 offset=000000 
   enabled
   Multipathing information:
   numpaths:       2
   c2t0d0s2        state=enabled       type=primary
   c1t0d0s2        state=disabled      type=secondary

   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 eva4k6k0_6, use the following command:

   # vxdmpadm getsubpaths dmpnodename=eva4k6k0_6

   Typical output from the vxdmpadm getsubpaths command is as follows:

   NAME                    STATE[A]   PATH-TYPE[M] CTLR-NAME ENCLR-TYPE ENCLR-NAME ATTRS
   ======================================================================================
   c0t50001FE1500A8F08d7s2 ENABLED(A) PRIMARY      c0        EVA4K6K    eva4k6k0      -
   c0t50001FE1500A8F09d7s2 ENABLED(A) PRIMARY      c0        EVA4K6K    eva4k6k0      -
   c0t50001FE1500A8F0Cd7s2 ENABLED    SECONDARY    c0        EVA4K6K    eva4k6k0      -
   c0t50001FE1500A8F0Dd7s2 ENABLED    SECONDARY    c0        EVA4K6K    eva4k6k0      -