Preventing MultipathingSuppress Devices from VxVMs View
This section describes how to exclude a device that is under VxVM or Dynamic Multipathing control. To prevent multipathing or suppress devices, enter the command
1. Select menu item 17 (Prevent Multipathing/Suppress devices from VxVM's view) from the vxdiskadm main menu.
The following message displays:
VxVM INFO V-5-2-1239 This operation might lead to some devices being suppressed from VxVM's view or prevent them from being multipathed by vxdmp. (This operation can be reversed using the vxdiskadm command).
3. Select an operation.
♦ Suppress all paths through a controller from VxVM's view: Select Option 1.
Enter a controller name when prompted: Enter a controller name:[ctlr_name<all,list<list-exclude<q<?]
♦ Suppress a path from VxVM's view: Select Option 2.
Enter a path when prompted. Enter a pathname or pattern:[<Pattern>,all<list<list-exclude<q?]
♦ Suppress disks from VxVM's view by specifying a VID:PID combination: Select Option 3 and read the messages displayed on the screen.
Enter a VID:PID combination when prompted. Enter a VID:PID combination:[<Pattern>,all<list<exclude<q<?]
The disks that match the VID:PID combination are excluded from VxVM. Obtain the Vendor ID and Product ID from the Standard SCSI inquiry data returned by the disk.
For example, the VID:PID combination for Sun's T3 disk array can be specified as SUN:T3. Obtain the Vendor ID and Product ID of the disk by the command /usr/lib/vxvm/diag.d/vxdmpinq.
♦ Suppress all but one path to a disk:
Select Option 4 and read the messages displayed on the screen before specifying a path.
Enter a path when prompted: Enter pathgroup: [<pattern>,list<list-exclude<q<?]
The next three options allow you to exclude devices from vxdmp.
♦ Prevent multipathing of all disks on a controller by VxVM.
Select Option 5 and read the messages displayed on the screen before specifying a controller.
Enter a controller name when prompted. The controller entered is excluded from DMP control.
Enter a controller name:[<ctlr-name>,all,list<list-exclude<q<?]
♦ Prevent multipathing of a disk by VxVM.
Select Option 6 to exclude the specified path from multipathing. The corresponding disks are claimed in the OTHER_DISKS category and are not multipathed. Read the messages displayed on the screen before specifying a path.
Enter a path at the prompt:
Enter a pathname or pattern:[<pattern>,all,list<list-exclude<q<?]
♦ Prevent multipathing of disks by specifying a VID:PID combination.
Select Option 7 to exclude disks by a VIP:PID combination. All disks returning a VID:PID combination are claimed in the OTHER_DISKS category and are not multipathed. Read the messages displayed on the screen before specifying a VIP:PID.
Enter the VID:PID combination at the prompt. Enter a VID:PID combination:[<pattern>,all,list<list-exclude<q<?]
Note If you selected any of the options, reboot the system for device exclusion to take effect and re-run vxdiskadm. After the reboot for menu item #17 (Prevent Multipathing/Suppress devices) run vxdiskadm again to complete the installation.
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