Filter
Top Products
153Administering dynamic multipathing (DMP)
Administering DMP using vxdmpadm
c4t2d15 1086 0 1086 0 0.390424 0.000000
c4t3d15 1048 0 1048 0 0.391221 0.000000
c5t3d15 1036 0 1036 0 0.390927 0.000000
c5t4d15 1021 0 1021 0 0.392752 0.000000
The enclosure can be returned to the single active I/O policy by entering the
following command:
# vxdmpadm setattr enclosure ENC0 iopolicy=singleactive
Disabling I/O for paths, controllers or array ports
Note: From release 5.0 of VxVM, this operation is supported for controllers that
are used to access disk arrays on which cluster-shareable disk groups are
configured.
Disabling I/O through a path, HBA controller or array port prevents DMP from
issuing I/O requests through the specified path, or the paths that are connected
to the specified controller or array port. The command blocks until all pending
I/O requests issued through the paths are completed.
To disable I/O for a path, use the following command:
# vxdmpadm [-c|-f] disable path=path_name
To disable I/O for the paths connected to an HBA controller, use the following
command:
# vxdmpadm [-c|-f] disable ctlr=ctlr_name
To disable I/O for the paths connected to an array port, use one of the following
commands:
# vxdmpadm [-c|-f] disable enclosure=enclr_name \
portid=array_port_ID
# vxdmpadm [-c|-f] disable pwwn=array_port_WWN
where the array port is specified either by the enclosure name and the array port
ID, or by the array port’s worldwide name (WWN) identifier.
The following are examples of using the command to disable I/O on an array
port:
# vxdmpadm disable enclosure=HDS9500V0 portid=1A
# vxdmpadm disable pwwn=20:00:00:E0:8B:06:5F:19
You can use the -c option to check if there is only a single active path to the disk.
If so, the
disable command fails with an error message unless you use the -f
option to forcibly disable the path.