H06.20 Software Installation and Upgrade Guide

13 Falling Back on the CLIMs, Loading the Previous RVU,
and Resuming Normal Operations
This chapter describes how to perform a system load of the previous RVU and how to revert the
CLIM software to the previous version.
NOTE: If your NonStop system does not have CLIMs installed, disregard the sections in this
chapter that describe CLIM fallback procedures.
Alerts
Before performing a system load:
• Before halting the processors, stop running applications, including TMF.
NOTE: To stop TMF, at a TACL prompt, enter: TMFCOM STOP TMF.
• Do not close the System Startup dialog box while startup is in progress. If you attempt to close
the dialog box, a message dialog box appears to alert you that the system startup process
will be stopped if you continue.
• If you stop a system startup before it has finished, the state of your system will be unpredictable.
You might need to perform another system startup to enable the system to resume normal
operation.
• If you are falling back and using next generation CLIMs and SAS disk enclosures, the system
to which you are falling back needs SPRs to support those components . See the CLuster I/O
Module (CLIM) Software Compatibility Reference for this information.
• If you must stop the system startup process, click Abort. (The abort process should take effect
within 30 seconds.)
• Under Configuration File, select Saved Version (CONFigxx.yy:)List the saved configuration
files by entering:
SCF FUP INFO $SYSTEM.ZSYSCONF.CONF*
You can refer to this listing later in the installation procedure.
• For detailed information on performing a system load, see Chapter 15 in the NonStop
Operations Guide.
CAUTION: If your intent is to remain on your current RVU, the NonStop Blade Complex
firmware must be reverted back as explained under “Revert to Previous NonStop Blade Complex
Firmware” (page 157).
Task Overview
If you have CLIMs in your system and need to fall back to the previous version of the CLIM software,
the steps to fall back on the CLIM are included in these procedures. If your system does not have
CLIMs installed, you can disregard these steps. Restoring the CLIMs assumes that you have saved
the CLIM configurations by issuing the CLIMBKUP command before upgrading your system, as
described in “Back Up CLIM Configuration Files” (page 66)and in the Cluster I/O Protocols (CIP)
Configuration and Management Manual. Falling back to previous versions of CLIM software adds
approximately one hour for each CLIM to the process of loading the system on the previous RVU.
NOTE: When you fall back, you must restore CLIM configuration files saved from the same RVU
as the NonStop system RVU to which you are falling back.
134 Falling Back on the CLIMs, Loading the Previous RVU, and Resuming Normal Operations