10.41 Is there any difference between doing an "UPDATE CONFIG from an SLT tape" and a "RESTORE of @.pub.sys", to get rid of some NMMGR changes?

From Gilles Schipper:

Yes, there is a big difference. But if all you want to do is back out some NMMGR changes, you shouldn't be doing either. As long as you have not initiated the dynamic configuration changes, all you really need to do is:

:hello manager.sys,pub
:file nmnew=nmconfig.pub;dev=1
:copy nmconfix,*nmnew

Then, shutdown the system and perform a "START NORECOVERY". This option is better and quicker than UPDATE CONFIG, and much, much better than a RESTORE of @.pub.sys.