HP-UX 11i v3 Installation and Update Guide, March 2013

not be affected by any persistent DSFs on the same server. (The agile mass storage stack, as well
as legacy and persistent DSFs, are discussed in “Next generation mass storage stack” (page 30).)
You may choose to migrate to the new agile mass storage stack or you can continue to use the
legacy mass storage stack. However, if you want to use the new features of the agile mass storage
stack and are not affected by existing limitations, you should consider migrating to the new mass
storage stack.
For more information on the new mass storage stack and to migrate from the legacy view to the
agile view, see the white papers “The Next Generation Mass Storage Stack: HP-UX 11i v3” and
“HP-UX 11i v3 Persistent DSF Migration Guide” (http://hp.com/go/hpux-core-docs).
System tuning for VxFS 4.1
If your system has the minimum amount of memory, you might 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://hp.com/go/hpux-core-docs.
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 22).
Uninstalling HP-UX 11i v3
If you cannot resolve problems after installing HP-UX 11i v3, then you might 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. See the Ignite-UX
Administration Guide available on the Instant Information DVD and at http://www.hp.com/
go/ignite-ux-docs.
• If you used a drd clone to create your system recovery image, use the drd activate
command to boot the unmodified image. See “Choosing drd clone” (page 24).
• 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, see
the Software Distributor Administration Guide (http://www.hp.com/go/sd-docs).
Diagnostics
Now that you have installed or updated HP-UX, you can use it to keep your system running. The
diagnostics software for HP servers helps you troubleshoot and fix problems when a hardware
failure occurs.
66 Post-install/update tasks and troubleshooting