HP Veritas Volume Manager 5.0 -UX 11i v3 Setting the attributes of the paths to an enclosure

146Administering dynamic multipathing (DMP)

Administering DMP using vxdmpadm

c3t115d0	0	0	0	0	0.000000	0.000000
		cpu usage = 59us		per cpu memory = 4096b
	OPERATIONS		BYTES		AVG TIME(ms)
PATHNAME	READS	WRITES	READS	WRITES	READS	WRITES
c3t115d0	0	0	0	0	0.000000	0.000000

Setting the attributes of the paths to an enclosure

You can use the vxdmpadm setattr command to set the following attributes of the paths to an enclosure or disk array:

■active

Changes a standby (failover) path to an active path. The example below specifies an active path for an A/P-C disk array:

#vxdmpadm setattr path c2t10d0 pathtype=active

■nomanual

Restores the original primary or secondary attributes of a path. This example restores the attributes for a path to an A/P disk array:

#vxdmpadm setattr path c3t10d0 pathtype=nomanual

■nopreferred

Restores the normal priority of a path. The following example restores the default priority to a path:

#vxdmpadm setattr path c1t20d0 pathtype=nopreferred

■preferred [priority=N]

Specifies a path as preferred, and optionally assigns a priority number to it. If specified, the priority number must be an integer that is greater than or equal to one. Higher priority numbers indicate that a path is able to carry a greater I/O load.

Note: Setting a priority for path does not change the I/O policy. The I/O policy must be set independently as described in “Specifying the I/O policy” on page 147.

This example first sets the I/O policy to priority for an Active/Active disk array, and then specifies a preferred path with an assigned priority of 2:

#vxdmpadm setattr enclosure enc0 iopolicy=priority

#vxdmpadm setattr path c1t20d0 pathtype=preferred \

priority=2