HP-UX 11i v3 Installation and Update Guide, September 2009 (Update 5 Release)

System tuning for VxFS 4.1
If your system has the minimum amount of memory, you may need to manually set
VxFS tunables for optimal performance after cold-installing or updating to HP-UX 11i
v3. Two VxFS tunables, vx_ninode and vxfs_bc_bufhwm, have an effect on system memory
consumption. For guidelines on setting them for machines with relatively low RAM,
see the Veritas File System 4.1 Administrator's Guide at http://www.docs.hp.com/en/
oshpux11iv3.html#VxFS.
Backing up the system
Now that you have a solid system configuration, you need to back it up. This provides
you with a stable configuration that you can use to rebuild the system, if necessary.
For more information, see “Backing up your system” (page 27).
Uninstalling HP-UX 11i v3
If you cannot resolve problems after installing HP-UX 11i v3, then you may want to
uninstall it. The process depends upon the install process you followed:
• If you previously created an operating system recovery image with either
make_net_recovery or make_tape_recovery using Ignite-UX, boot the
system from that media to return the OS and any archived applications to the
previous release. Refer to the Ignite-UX Administration Guide available on the Instant
Information DVD and at http://docs.hp.com/en/oshpux11iv3.html#Ignite-UX.
• If you used a drd clone to create your system recovery image, see “Choosing drd
clone” (page 29).
• If you do not use Ignite-UX or DRD, or do not have a current operating system
recovery image:
— If your applications and data are on a separate disk from the OS, cold-install
the previous OS. Doing this ensures a clean OS installation, removing all
previous upgrade and patch information.
— If applications, data, or both are on the same volume with the OS, boot from
the previously-saved system recovery tape to return to a previous OS. These
expert recovery processes are in the Ignite-UX Administration Guide.
Removing applications and patches
To determine which applications are on the system and where they are located, use
swlist. If you only need to remove applications or patches from the system, use
swremove. For details, refer to the Software Distributor Administration Guide (http://
docs.hp.com/en/oshpux11iv3.html).
84 Post-install/update tasks and troubleshooting