VERITAS Volume Manager 4.1 Administrator's Guide

Administering Dynamic Multipathing (DMP)
Administering DMP Using vxdmpadm
Chapter 3 135
ENCLR_NAME ENCLR_TYPE ENCLR_SNO STATUS ARRAY_TYPE
==========================================================================
Disk Disk DISKS CONNECTED Disk
ANA0 ACME 508002000001d660 CONNECTED A/A
enc0 A3 60020f20000001a90000 CONNECTED A/P
Displaying Information About TPD-Controlled Devices
The third-party driver (TPD) coexistence feature allows I/O that is controlled by third-party
multipathing drivers to bypass DMP while retaining the monitoring capabilities of DMP. The
following commands allow you to display the paths that DMP has discovered for a given TPD
device, and the TPD device that corresponds to a given TPD-controlled node discovered by
DMP:
# vxdmpadm getsubpaths tpdnodename=TPD_node_name
# vxdmpadm gettpdnode nodename=DMP_node_name
For example, consider the following disks in an EMC Symmetrix array controlled by
PowerPath, which are known to DMP:
# vxdisk list
DEVICE TYPE DISK GROUP STATUS
emcpower10s2 auto:sliced disk1 ppdg online
emcpower11s2 auto:sliced disk2 ppdg online
emcpower12s2 auto:sliced disk3 ppdg online
emcpower13s2 auto:sliced disk4 ppdg online
emcpower14s2 auto:sliced disk5 ppdg online
emcpower15s2 auto:sliced disk6 ppdg online
emcpower16s2 auto:sliced disk7 ppdg online
emcpower17s2 auto:sliced disk8 ppdg online
emcpower18s2 auto:sliced disk9 ppdg online
emcpower19s2 auto:sliced disk10 ppdg online
The following command displays the paths that DMP has discovered, and which correspond to
the PowerPath-controlled node, emcpower10s2:
# vxdmpadm getsubpaths tpdnodename=emcpower10s2