This is a catch 22 , you need to apply a patch to fix a backup problem , yet you want to backup before applying a patch. This is where you will have to assume some risk, and apply the patch w/o a backup.
Go to Common Services -> Device and Credentials -> Device Mgmt and export the entire DCR (All devices) to a CSV file. Make sure you browse to someplace outside application space, I usually place the file at c:\. Also make sure you check mark the include credentials box, so you also have all your device passwords. This is your D/R plan, if things were to fail you will have your device list you can import in an emergency.
Or you can try the suggestion of clearing DFM to mitigate potential loss so you can get a good backup of the rest of LMS. Just be sure to view your notifications and cut/paste into note pad so they can be rebuilt. You will lose history and local customizations to Polling and Thresholds and DDV.
# net stop crmdmgt
kill any sm_* / brstart processes still running
# cd ...\CSCOpx\bin
# perl dbRestoreOrig.pl dsn=dfmInv dmprefix=INV
# perl dbRestoreOrig.pl dsn=dfmFh dmprefix=FH
# perl dbRestoreOrig.pl dsn=dfmEpm dmprefix=EPM
Use explorer to go to ...\CSCOpx\objects\smarts\local\repos\icf and delete all .rps files
perform the backup.
