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134 Administering dynamic multipathing (DMP)
Disabling and enabling multipathing for specific devices
◆
Select option 1 to exclude all paths through the specified controller from the
view of VxVM. These paths remain in the disabled state until the next
reboot, or until the paths are re-included.
◆ Select option 2 to exclude specified paths from the view of VxVM.
◆ Select option 3 to exclude disks from the view of VxVM that match a
specified Vendor ID and Product ID.
◆ Select option 4 to define a pathgroup for disks that are not multipathed by
VxVM. (A pathgroup explicitly defines alternate paths to the same disk.)
Only one path is made visible to VxVM.
◆ Select option 5 to disable multipathing for all disks on a specified controller.
◆ 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