VERITAS Volume Manager 4.1 Hardware Notes

Hardware Notes
The DMP Administration Utility - vxdmpadm
Chapter 122
c1t5d0 ENABLED -c2t5d0 Disk Disk
c1t6d0 ENABLED -c2t6d0 Disk Disk
c1t16d0 ENABLED -c2t16d0 Disk Disk
c1t17d0 ENABLED -c2t17d0 Disk Disk
c1t18d0 ENABLED -c2t18d0 Disk Disk
c1t19d0 ENABLED -c2t19d0 Disk Disk
c1t20d0 ENABLED -c2t20d0 Disk Disk
c1t21d0 ENABLED -c2t21d0 Disk Disk
c1t22d0 ENABLED -c2t22d0 Disk Disk
The output display shows the paths that are connected to the controller named c1.
You can use the getsubpaths option combined with the dmpnodename attribute to list all
paths that are connected to a LUN (represented by a DMP device). For example, to list
information about paths that lead to the LUN named c1t0d0, use the following command:
# vxdmpadm getsubpaths dmpnodename=c1t0d0
to display the output from the above command:
NAME STATE PATH-TYPE CTLR-NAME ENCLR-TYPE ENCLR-NAME
==================================================================
c2t0d0 DISABLED -c2 Disk Disk
c1t0d0 ENABLED -c1 Disk Disk
The listing above shows that the DMP device c1t0d0 has two paths to it that are named
c1t0d0 and c2t0d0. Additional information indicates that only one of these paths is available
for I/O operations. One of these paths is in the ENABLED state and the other is in the
DISABLED state. Both paths are in a SEAGATE disk array.
To retrieve the name of the DMP device that controls a particular path, the getdmpnode
option can be combined with the nodename attribute by using the following command:
# vxdmpadm getdmpnode nodename=c1t0d0
to display the output from the above command:
ME STATE ENCLR-TYPE PATHS ENBL DSBL ENCLR-NAME
===============================================================
c2t0d0 ENABLED Disk 2 2 0 Disk
This example output shows that the physical path c1t0d0 is owned by the DMP device
c2t0d0, which has two paths to it.