User`s guide

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Upgrade Procedures
RedHawk Linux Version 5.4 Release Notes 43
6.0. Upgrade Procedures
Review the following points before upgrading the software:
• It is recommended that the installer first read through the entire procedure once before
actually performing the upgrade.
• It is strongly recommended that installation and updates of software be performed in
single-user mode to guard against the possibility of corrupting a running application.
• Install all available upgrades. No quality claims are made by Concurrent unless all
appropriate version levels of all RedHawk Linux software are installed.
• The media in use is accessed at various times and must be kept in the drive during the
installation until you are instructed to install different media.
• Prior to upgrade, remove any floppy media that may have been left in the machine.
• The Red Hat kernel should be running when upgrading to RedHawk Linux Version 5.4.
6.1 Pre-Upgrade Procedure
• Before beginning the upgrade procedure, care should be taken to avoid overwriting and
thereby destroying files or filesystems that you cannot restore. Identify and back up all
important files to a safe location, preferably on a system other than the one on which you
are performing the upgrade. For maximum safety, it is recommended that you disconnect
all disks that you do not want the upgrade process to accidently overwrite.
• On systems with multiple Red Hat installations, identify all the appropriate mount points
and partitions so that you can correctly answer questions from the installer during the
upgrade process.
To identify the partition that contains the root file system to be upgraded, boot the
installion to be upgraded into run level 1 and issue the mount command. For example:
[root@ihawk ~]$ mount | grep 'on / type'
/dev/sda2 on / type ext3 (rw)
In this example, the root partition on which this RHEL5.4 was installed is /dev/sda2.
Resolve any discrepancies before continuing with the upgrade.
• Avoid adding or removing drives to a system before or after an install or upgrade to
prevent having difficulties with grub, the BIOS, and the operating system correctly
identifying various drives and partitions.
• If you cannot reboot your system after the upgrade, refer to the section “How to Use Linux
Rescue” on page 70.
Use the upgrade procedures provided here only if you are upgrading from
Version 5.1 or 5.2 to Version 5.4.
If generating or regenerating a RedHawk 5.4 system, migrating a system
from Version 4.2 or earlier, or converting a system from 32-bit to 64-bit,
follow the steps in “Installation Procedures” on page 12.