NonStop S-Series Hardware Installation and FastPath Guide (G06.29+)

Troubleshooting
HP NonStop S-Series Hardware Installation and FastPath Guide—541880-002
D-26
Backing Out a Software Revision
Backing Out a Software Revision
If you encounter problems, you can back out from the current software revision to a
previous revision.
For example, if you install an SPR that causes system problems, you can use the
following procedure to return to the previous revision. DSM/SCM makes the current
revision inaccessible, reapplies the previous revision, and displays instructions for
activating the previous revision.
Prerequisites
•
Skip 7. Stop System and 8. Load System From Saved Configuration if the current
revision did not require SYSGENR or system load.
•
When backing out a revision, you do not need to fall back to a previous firmware
version if you have not updated the firmware to versions different from that shipped
with your NonStop S-series server.
•
If you need to back out a revision and DSM/SCM will not run, see the DSM/SCM
User’s Guide.
1. Start DSM/SCM
1. If the TMF subsystem is not already running, start it at a TACL prompt:
> TMFCOM START TMF
2. If DSM/SCM is not already running, start it:
> VOLUME $DSMSCM.ZDSMSCM
> RUN STARTSCM
Task Page
Prerequisites
D-26
1. Start DSM/SCM D-26
2. Start and Log On to Target Interface D-27
3. Initiate Backout Activity D-27
4. Monitor Backout Process D-28
5. Stop All Applications D-28
6. Rename Software Files Using ZPHIRNM D-29
7. Stop System D-29
8. Load System From Saved Configuration D-30
9. Start Applications D-30