Dynamic Multi-Pathing 7.3.1 Administrator's Guide - Linux

active

Changes a standby (failover) path to an active path. The following example specifies an active path for an array:

# vxdmpadm setattr path sde pathtype=active

nomanual

Restores the original primary or secondary attributes of a path. This example restores the path to a JBOD disk:

# vxdmpadm setattr path sdm pathtype=nomanual

nopreferred

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

# vxdmpadm setattr path sdk \
  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.

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 sdk pathtype=preferred \
  priority=2

primary

Defines a path as being the primary path for a JBOD disk array. The following example specifies a primary path for a JBOD disk array:

# vxdmpadm setattr path sdm pathtype=primary

secondary

Defines a path as being the secondary path for a JBOD disk array. The following example specifies a secondary path for a JBOD disk array:

# vxdmpadm setattr path sdn pathtype=secondary

standby

Marks a standby (failover) path that it is not used for normal I/O scheduling. This path is used if there are no active paths available for I/O. The next example specifies a standby path for an A/P-C disk array:

# vxdmpadm setattr path sde pathtype=standby