G06.26 Software Installation and Upgrade Guide
Overview of Installing G06.26
G06.26 Software Installation and Upgrade Guide—529886-002
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Falling Back to the Previous RVU
Falling Back to the Previous RVU
If you encounter a problem that cannot be resolved while running G06.26, you can fall
back to a previous G-series RVU, provided you have already installed the appropriate
fallback SPRs for your system.
Fallback SPRs are described in Section 3, Installing SPRs Before Upgrading to the
G06.26 RVU.
Table 1-7 maps the major tasks involved with falling back to a previous RVU to the
tools with which you perform the tasks and the sections in this guide in which these
tasks are documented.
Note. In most instances, it is not necessary to return SP firmware or SCSI boot code back to
the previous firmware versions when falling back to an earlier RVU. Check with Scout for SPR
backward compatibility. If you are returning to an RVU prior to G06.16, you must return
processor boot code back to the previous version before performing a system load of the
previous RVU. If you are returning to a G06.16 or later RVU, it is not necessary to return
processor boot code back to the previous version.
Table 1-7. Tasks and Tools for Falling Back to the Previous RVU
To Perform This Task... Use This Tool...
Documented in This
Section...
1. Submit a backout request. DSM/SCM Target
Interface (ZPHITI)
Section 14, Backing Out the
DSM/SCM Revision
2. Return the firmware back to the
previous versions (if necessary).
TSM Service
Application
OSM Service
Connection (if
installed)
Section 15, Returning
Firmware to Previous
Versions
3. Reactivate the previous software
revision.
DSM/SCM
ZPHIRNM
program
Section 16, Running
ZPHIRNM to Reactivate the
Previous Software Revision
4. Load the NonStop operating
system from the previous RVU into
the first processor.
TSM Low-Level
Link Application
OSM Low-Level
Link (if installed)
Section 17, Loading the
Previous RVU and
Resuming Normal
Operations
5. Reload the remaining processors. TACL RELOAD
command
Section 17, Loading the
Previous RVU and
Resuming Normal
Operations
6. Run the FALLBACK macro if you
are backing out to a pre-D46 PVU
or a pre-ABK SPR.
FALLBACK macro Section 17, Loading the
Previous RVU and
Resuming Normal
Operations