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

5
Remove the LUNs from the vxdisk list. Enter the following command on all
nodes in a cluster:
# vxdisk rm da-name
This is a required step. If you do not perform this step, the DMP device tree
shows ghost paths.
6
Clean up the HP-UX 11i v3 SCSI device tree for the devices that you removed
in step 5.
See “Cleaning up the operating system device tree after removing LUNs”
on page 203.
This step is required. You must clean up the operating system SCSI device
tree to release the SCSI target ID for reuse if a new LUN is added to the host
later.
7
Scan the operating system device tree.
See “Scanning an operating system device tree after adding or removing
LUNs” on page 203.
8
Use VxVM to perform a device scan. You must perform this operation on all
nodes in a cluster. Enter one of the following commands:
■
# vxdctl enable
■
# vxdisk scandisks
9
Refresh the DMP device name database using the following command:
# vxddladm assign names
10
Verify that the LUNs were removed cleanly by answering the following
questions:
■ Is the device tree clean?
Verify that the operating system metanodes are removed from the /dev
directory.
■ Were all the appropriate LUNs removed?
Use the DMP disk reporting tools such as the vxdisk list command
output to determine if the LUNs have been cleaned up successfully.
■ Is the vxdisk list output correct?
Verify that the vxdisk list output shows the correct number of paths
and does not include any ghost disks.
201Online dynamic reconfiguration
Reconfiguring a LUN online that is under DMP control