Symantec logo

Displaying the paths to a disk

The vxdisk command is used to display the multipathing information for a particular metadevice. The metadevice is a device representation of a particular physical disk having multiple physical paths from one of the system's HBA controllers. In VxVM, all the physical disks in the system are represented as metadevices with one or more physical paths.

You can 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


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, 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 the path to c2t0d0s2 is active (state=enabled) and that the other path c1t0d0s2 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.