Backing out a patch(es)

[ROSS HANSON]

If you load a patch and find out, a week later, that
the patch is bad... how do you back it out of your
system?

[Christopher McCray_1]

Hello,


You can use the swremove command and choose the one you need to get rid of.

Did you receive this notification from HP?? Normally they can tell you alternate patches, or if a new one was created, and in great detail.

Hope this helps
Chris

[Sanjay_6]

Hi Ross,

you can use "swremove" to remove the patch.

Regds

[Michael Tully]

Hi,

Depending on the type of patch you could
use the 'swremove' program to do it. Open
the interactive session and highlight the
patch to be backed out and remove it.
Just a word of caution.... Before doing
any patch maintenance it is in your best
interests to make sure that you have at
least one ignite (make recovery) tape.
To create one
# make_tape_recovery -x inc_entire=vg00 -I -a -v /dev/rmt/0mn

What is the patch?

-Michael

[S.K. Chan]

Another option you can use is the non-interactive swremove method. Put your patch id in a file called "patches". You can have more than 1 patch entry in the file. Then run ..

# swremove -p -f patches

to preview and if ok run ..

# swremove -f patches

[Darrell Allen]

Hi Ross,

Please note that some patches will require a reboot when you remove them. Any PHKL patch is a kernel patch and will rebuild the kernel and thus require a reboot.

Darrell

[A. Clay Stephenson]

Hi Ross:

Assuming that you did not turn off the option to save the old patches, then all you need to do is run swremove. This is one of the reasons it's nice to have a sandbox. You can test the patch long before you must install it in production. An old box bought on the used equipment market can pay for itself many times over.