Upgrading or Restoring the Linux Operating System4-4 Express5800/ftServer: System Administrator’s Guide for the Linux Operating SystemThe following topics apply when upgrading or restoring the Linux operating system.• ‘‘Express5800/ftServer Kernel Modules”• ‘‘Upgrading or Restoring the Linux Operating System”Express5800/ftServer Kernel ModulesWhenever the Linux operating system is upgraded, a new Linux kernel is installed.Whenever Express Builder is installed or upgraded, the fault-tolerantExpress5800/ftServer kernel modules are automatically rebuilt at the next boot time.These modules must be present for fault-tolerant operation. The followingrequirements must be met, to ensure that these modules will be rebuilt.• Express5800/ftServer kernel modules are only built for SMP kernels. Make sure thatyou only use SMP kernels.• The kernel-smp-devel package must be installed. The version of this package mustmatch the version of the kernel-smp in use.• The /boot file system must be mounted when Express5800/ftServer kernelmodules are rebuilt so the initrd can be re-created with these modules (/bootis mounted by /etc/fstab).• The directory /opt/ft must reside within the root file system.Immediately after rebuilding kernel modules at boot time, the system automaticallyreboots to place these rebuilt modules into use. If the system cannot successfully buildall the required Express5800/ftServer kernel modules, a policy of whether anon-fault-tolerant boot is allowed or prohibited takes effect. This policy is set by the/etc/opt/ft/modules.policy file and affected by the/etc/opt/ft/non_ft_boot.sh script. Execute the install.sh installationscript to review or change the policy.Upgrading the Linux Operating SystemUse the Red Hat Update Agent (up2date) to install a new Linux operating system Uupdate.Before you install a new Linux operating system U update (for example U3), make sureto do the following:• See the Release Notes: Express5800/ftServer for the Linux Operating Systemor check with the NEC Corporation of America Customer Support Center or yourauthorized NEC service representative to make sure there is an Express Builderversion available tosupport the Linux operating system update.• Make sure the system is registered with Red Hat and has entitlement on the RHNserver.
