Setting customized names for DMP nodes

The DMP node name is the meta device name which represents the multiple paths to a disk. The DMP node name is generated from the device name according to the SF naming scheme.

You can specify a customized name for a DMP node. User-specified names are persistent even if names persistence is turned off.

You cannot assign a customized name that is already in use by a device. However, if you assign names that follow the same naming conventions as the names that the DDL generates, a name collision can potentially occur when a device is added. If the user-defined name for a DMP device is the same as the DDL-generated name for another DMP device, the vxdisk list command output displays one of the devices as 'error'.

To specify a custom name for a DMP node

You can also assign names from an input file. This enables you to customize the DMP nodes on the system with meaningful names.

To assign DMP nodes from a file

  1. Use the script vxgetdmpnames to get a sample file populated from the devices in your configuration. The sample file shows the format required and serves as a template to specify your customized names.
  2. To assign the names, use the following command:
    # vxddladm assign names file=pathname

To clear custom names