Veritas Volume Manager 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

Administering DMP Using vxdmpadm
116 VERITAS Volume Manager Administrator’s Guide
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
See “Changing Device Naming for TPD-Controlled Enclosures” on page 72 for
information on how to select whether OS or TPD-based device names are displayed.
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
emcpower10 auto:sliced disk1 ppdg online
emcpower11 auto:sliced disk2 ppdg online
emcpower12 auto:sliced disk3 ppdg online
emcpower13 auto:sliced disk4 ppdg online
emcpower14 auto:sliced disk5 ppdg online
emcpower15 auto:sliced disk6 ppdg online
emcpower16 auto:sliced disk7 ppdg online
emcpower17 auto:sliced disk8 ppdg online
emcpower18 auto:sliced disk9 ppdg online
emcpower19 auto:sliced disk10 ppdg online
The following command displays the paths that DMP has discovered, and which
correspond to the PowerPath-controlled node, emcpower10:
# vxdmpadm getsubpaths tpdnodename=emcpower10
NAME TPDNODENAME PATH-TYPE[-] DMP-NODENAME ENCLR-TYPE ENCLR-NAME
=====================================================================
c7t0d10 emcpower10s2 - emcpower10 EMC EMC0
c6t0d10 emcpower10s2 - emcpower10 EMC EMC0
Conversely, the next command displays information about the PowerPath node that
corresponds to the path, c7t0d10, discovered by DMP:
# vxdmpadm gettpdnode nodename=c7t0d10
NAME STATE PATHS ENCLR-TYPE ENCLR-NAME
=====================================================================
emcpower10s2 ENABLED 2 EMC EMC0