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Partial device discovery

The Dynamic Multipathing (DMP) feature of VxVM supports partial device discovery where you can include or exclude sets of disks or disks attached to controllers from the discovery process.

The vxdisk scandisks command rescans the devices in the OS device tree and triggers a DMP reconfiguration. You can specify parameters to vxdisk scandisks to implement partial device discovery. For example, this command makes VxVM discover newly added devices that were unknown to it earlier:

# vxdisk scandisks new

The next example discovers fabric devices (that is, devices with the characteristic DDI_NT_FABRIC property set on them):

# vxdisk scandisks fabric

The following command scans for the devices c1t1d0 and c2t2d0:

# vxdisk scandisks device=c1t1d0,c2t2d0

Alternatively, you can specify a ! prefix character to indicate that you want to scan for all devices except those that are listed:

# vxdisk scandisks !device=c1t1d0,c2t2d0

You can also scan for devices that are connected (or not connected) to a list of logical or physical controllers. For example, this command discovers and configures all devices except those that are connected to the specified logical controllers:

# vxdisk scandisks !ctlr=c1,c2

The next command discovers devices that are connected to the specified physical controller:

# vxdisk scandisks pctlr=/pci@1f,4000/scsi@3/

The items in a list of physical controllers are separated by + characters.

You can use the command vxdmpadm getctlr all to obtain a list of physical controllers.

You may specify only one selection argument to the vxdisk scandisks command. Specifying multiple options results in an error.

See the vxdisk(1M) manual page.