Veritas Volume Manager 5.0 Release Notes HP-UX 11i v3 (5992-1952, August 2011)

NOTE: System Administration Manager (SAM) is deprecated in HP-UX 11i v3. HP System
Management Homepage (HP SMH) is the system administration tool for managing HP-UX. HP SMH
provides systems management functionality, at-a-glance monitoring of system component health
and consolidated log viewing. HP SMH provides Graphical User Interface (GUI), Text User Interface
(TUI), and Command Line Interface (CLI) for managing HP-UX. You can access these interfaces
using the /usr/sbin/smh command.
When you run either the /usr/sbin/sam or /usr/sbin/smh command and the DISPLAY
environment variable is set, HP SMH opens in the default web browser. If the DISPLAY environment
variable is not set, HP SMH opens using its terminal interface.
Coexistence with HP Logical Volume Manager (LVM)
The Veritas Volume Manager for HP-UX co-exists with HP Logical Volume Manager (LVM). Both
LVM and VxVM utilities are aware of the other volume manager, and do not overwrite disks that
are being managed by the other volume manager. As mentioned above, the administrative utilities
(SAM and VEA) recognize and identify all disks on the system. Although this release is targeted
at new customer installations, a conversion utility, vxvmconvert, is provided for converting LVM
volume groups to VxVM volume groups. For more information on using vxvmconvert, see the
Veritas Volume Manager 5.0 Migration Guide.
Native Multipathing with Veritas Volume Manager
By default, VxVM uses DMP to manage multiple paths to I/O devices. It is possible to configure
VxVM to use HP-UX native multipathing instead by defining I/O devices as foreign devices, which
are bypassed by DMP. To revert to using DMP, you must remove the I/O devices from the foreign
device list. This section outlines a system-wide procedure to switch between using DMP and using
HP-UX native multipathing using the vxddladm addforeign and vxddladm rmforeign
commands. Using the procedure you can migrate all devices in the /dev/disk and /dev/rdisk
directories. To migrate an individual device or only a subset of devices, see the vxdiskadm3(1M).
IMPORTANT: For native multipathing you must install all the patches that are listed in the “System
Requirements” (page 14) section. Without these patches, specifically PHCO_38235 and
PHKL_38236, native multipathing is not supported. These patches can be installed from http://
www.itrc.hp.com.
CAUTION: Before switching between DMP and HP-UX native multipathing, ensure that no
application is accessing the VxVM volumes and no file system is mounted on the VxVM volumes.
Otherwise, you cannot complete the following procedure. The following procedure cannot be used
on a system that has VxVM root disks.
Migrating from DMP to HP-UX native multipathing for systems that do not have VxVM root disks
Prior to migrating from DMP to HP-UX native multipathing, ensure that there are no applications
accessing VxVM volumes and no file system is mounted on VxVM volumes.
To migrate from DMP to HP-UX native multipathing, complete the following steps:
1. To stop all volumes in each disk group on the system, enter the following command:
# vxvol –g diskgroup stopall
2. To initiate the migration, enter the following commands:
# vxddladm addforeign blockdir=/dev/disk chardir=/dev/rdisk
# vxconfigd –kr reset
3. To restart the volumes in each group, enter the following command:
# vxvol –g diskgroup startall
Coexistence with HP Logical Volume Manager (LVM) 15