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


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, 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 the path to hdisk18 is active (state=enabled) and that the other path hdisk26 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.