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

array port resulted in all primary paths being disabled, DMP will failover to active
secondary paths and I/O will continue on them.
After the operation is over, you can use vxdmpadm to re-enable the paths through
the controllers.
See “Disabling I/O for paths, controllers or array ports” on page 187.
See “Enabling I/O for paths, controllers or array ports” on page 188.
You can also perform certain reconfiguration operations dynamically online.
See “About online dynamic reconfiguration” on page 199.
About displaying DMP database information
You can use the vxdmpadm command to list DMP database information and perform
other administrative tasks. This command allows you to list all controllers that
are connected to disks, and other related information that is stored in the DMP
database. You can use this information to locate system hardware, and to help
you decide which controllers need to be enabled or disabled.
The vxdmpadm command also provides useful information such as disk array serial
numbers, which DMP devices (disks) are connected to the disk array, and which
paths are connected to a particular controller, enclosure or array port.
See “Administering DMP using vxdmpadm” on page 159.
Displaying the paths to a disk
The vxdisk command is used to display the multi-pathing information for a
particular metadevice. The metadevice is a device representation of a particular
physical disk having multiple physical paths from one of the system’s HBA
controllers. In DMP, all the physical disks in the system are represented as
metadevices with one or more physical paths.
155Administering Dynamic Multi-Pathing
About displaying DMP database information