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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:
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, use the following command:
For example, to view multipathing information for hdisk18, use the following command:
Typical output from the vxdisk list command is as follows:
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/hdisk18
privpaths: char=/dev/vx/rdmp/hdisk18
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
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
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.