The Dynamic Multi-Pathing (DMP) node name is the metadevice name that represents the multiple paths to a disk. The Device Discovery Layer (DDL) generates the DMP node name from the device name according to the Dynamic Multi-Pathing (DMP) 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 specify a custom name for an enclosure
To assign DMP nodes from a file
# vxddladm -l assign names > filename
The sample file shows the format required and serves as a template to specify your customized names.
You can also use the script vxgetdmpnames to get a sample file populated from the devices in your configuration.
# vxddladm assign names file=pathname