Veritas Volume Manager 5.1 SP1 Administrator"s Guide (5900-1506, April 2011)

To display the minimum redundancy level for a particular device, use the vxdmpadm
getattr command, as follows:
# vxdmpadm getattr enclosure|arrayname|arraytype \
component-name redundancy
For example, to show the minimum redundancy level for the enclosure
HDS9500-ALUA0:
# vxdmpadm getattr enclosure HDS9500-ALUA0 redundancy
ENCLR_NAME DEFAULT CURRENT
=============================================
HDS9500-ALUA0 0 4
Specifying the minimum number of active paths
You can set the minimum redundancy level for a device or an enclosure. The
minimum redundancy level is the minimum number of paths that should be active
for the device or the enclosure. If the number of paths falls below the minimum
redundancy level for the enclosure, a message is sent to the system console and
also logged to the DMP log file. Also, notification is sent to vxnotify clients.
The value set for minimum redundancy level is stored in the dmppolicy.info file,
and is persistent. If no minimum redundancy level is set, the default value is 0.
You can use the vxdmpadm setattr command to set the minimum redundancy
level.
To specify the minimum number of active paths
◆
Use the vxdmpadm setattr command with the redundancy attribute as
follows:
# vxdmpadm setattr enclosure|arrayname|arraytype component-name
redundancy=value
where value is the number of active paths.
For example, to set the minimum redundancy level for the enclosure
HDS9500-ALUA0:
# vxdmpadm setattr enclosure HDS9500-ALUA0 redundancy=2
179Administering Dynamic Multi-Pathing
Administering DMP using vxdmpadm