Veritas Volume Manager 5.0 Administrator's Guide (September 2006)

128 Administering dynamic multipathing (DMP)
Disabling and enabling multipathing for specific devices
◆
Select option 6 to disable multipathing for specified paths. The disks that correspond
to a specified path are claimed in the OTHER_DISKS category and are not
multipathed.
◆ Select option 7 to disable multipathing for disks that match a specified Vendor ID and
Product ID. The disks that correspond to a specified Vendor ID and Product ID
combination are claimed in the OTHER_DISKS category and are not multipathed.
◆ Select option 8 to list the devices that are currently suppressed or not multipathed.
Enabling multipathing and making devices visible to VxVM
Note: Some of the operations described in this section require a reboot of the system.
1 Select menu item 18 (
Allow multipathing/Unsuppress devices from
VxVM’s view
) from the vxdiskadm main menu to re-enable multipathing for a
device, or to make a device visible to VxVM again. You are prompted to confirm
whether you want to continue.
2 Select the operation you want to perform from the displayed list:
1 Unsuppress all paths through a controller from VxVM’s view
2 Unsuppress a path from VxVM’s view
3 Unsuppress disks from VxVM’s view by specifying a VID:PID
combination
4 Remove a pathgroup definition
5 Allow multipathing of all disks on a controller by VxVM
6 Allow multipathing of a disk by VxVM
7 Allow multipathing of disks by specifying a VID:PID
combination
8 List currently suppressed/non-multipathed devices
? Display help about menu
?? Display help about the menuing system
q Exit from menus
◆
Select option 1 to make all paths through a specified controller visible to VxVM.
◆ Select option 2 to make specified paths visible to VxVM.
◆ Select option 3 to make disks visible to VxVM that match a specified Vendor ID and
Product ID.
◆ Select option 4 to remove a pathgroup definition. (A pathgroup explicitly defines
alternate paths to the same disk.) Once a pathgroup has been removed, all paths that
were defined in that pathgroup become visible again.
◆ Select option 5 to enable multipathing for all disks that have paths through the
specified controller.
◆ Select option 6 to enable multipathing for specified paths.