Veritas Volume Manager 5.0.1 Release Notes, HP-UX 11i v3, First Edition, November 2009

# vxdisk rm disk_access_name
# vxdisk define disk_access_name
HP recommends that you use the vxdisksetup command to initialize a disk for use by
VxVM. This method does not create persistent disk access records.
To initialize a disk for regular use, run the following command:
# /etc/vx/bin/vxdisksetup -I disk_access_name
In some cases, issues can occur with persistent disk access records. If a disk group is created
using the persistent disk access records, these persistent disks may enter an error state when
the naming scheme changes. Certain hardware reconfigurations can also cause the persistent
disks to be in an error state.
Workaround
If the persistent disks are in an error state due to a change in the naming scheme or hardware
reconfiguration, you can remove the error state using one of the following procedures. The
procedure depends on whether the host is in a cluster or is a stand-alone host.
To remove the error state for persistent disks in a disk group for which host is not part of a
cluster, complete the following steps:
1. Unmount the volumes if they are in use.
2. Restart the VxVM configuration daemon:
# vxconfigd -kr reset
To remove the error state for persistent disks in a disk group for which the host is part of a
cluster, complete the following steps:
1. Unmount the volumes if they are in use.
2. Deport the disk group:
# vxdg deport diskgroup
3. Rescan the devices:
# vxdisk scandisks
4. Import the disk group:
# vxdg import diskgroup
• Problem
Disabling HP-UX native ALUA for arrays operating in ALUA mode
For Storage Foundation 5.0.1, HP-UX 11i v3, and for the storage arrays operating in ALUA
mode, you must disable Native Multi-Pathing ALUA (nMP) mode to ensure that DMP
functions properly in the Storage Foundation stack. You can use one of the following methods
to disable nMP:
— Disabling Native Multi-Pathing ALUA (nMP) mode at the LUN level
This method sets the alua_enabled attribute for each LUN and its multiple paths to
false. Additionally, the alua_enabled attribute must be made persistent by setting
save_attr. The scsimgr command is used to enable or disable ALUA mode for a
LUN. For more information on the scsimgr command, see the scsimgr(1M) manpage.
To disable nMP at the LUN level, complete the following steps:
Known Problems And Workarounds 19