G06.25 Software Installation and Upgrade Guide

G06.25 Software Installation and Upgrade Guide—529430-001
13-1
13 Preparing to Fall Back
If you encounter a problem that cannot be resolved while running the G06.25 RVU, you
can fall back to a G06.06 or later G-series RVU, provided that you have already
installed the appropriate fallback SPRs, as described in Section 3, Installing SPRs
Before Upgrading to the G06.25 RVU. If you did not install the appropriate fallback
SPRs before installing the G06.25 RVU, contact your service provider.
Alerts
Before falling back from the G06.25 RVU:
•
Review G06.25 Installation and Fallback Alerts for Products on page 1-23.
•
Verify that you have a saved configuration database (see Save the Current
Configuration File (CONFxxyy) on page 4-1).
•
It is not necessary to return SP firmware (unless pre-G06.08) or SCSI boot code
back to the previous versions when falling back to an earlier RVU. However, if you
want to do so, HP recommends that you update the firmware before performing the
system load of the previous RVU.
•
If you are falling back to an RVU prior to G06.13, you will not be able to access any
NonStop SQL/MP Format 2 partitions you might have created.
•
If you are falling back to an RVU prior to G06.08 and you upgraded to NonStop
S7400 and S74000 PMF CRUs after installing G06.25, these PMF CRUs must be
removed. If you are falling back to a pre-G06.16 and you upgraded to NonStop
S7600, S76000, S86000, S7800, or S78000 PMF CRUs after installing G06.25,
these PMF CRUs must be removed. If you are falling back to any RVU prior to
G06.25, you must remove the S88000 PMF CRUs. You can generally retain TSM
and OSM software because they are compatible with earlier software. OSM
requires the SP firmware file T1089ABK or later.
•
If you tried to install new PMF CRUs that require a processor-type change in the
CONFTEXT file, you might have to change the CONFTEXT file again if you
perform a fallback and want to build an older release after falling back.
•
If you are falling back 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. HP recommends that you update the firmware before performing the system
load of the previous RVU.
•
If you have to fall back to a pre-G06.21 RVU, you must deinstall the previous WAN
Wizard Pro and reinstall the previous WAN Wizard Pro on your system console.
Note. Do not revert back to pre-T7953AAG versions of SWAN concentrator firmware. The
T7953AAG and later versions are compatible with the earliest G-series RVUs and contain
important fixes and enhancements.