Mine

Error trying to open /dev/dvd exclusively ... retrying in 1 second.
Trying to open without locking.
FATAL: /dev/dvd already carries isofs!

Error while writing part file:  /usr/bin/
01-Jan 16:33 home-sd: Marking Volume "25" in Error in Catalog.
01-Jan 16:33 home-sd: Please mount Volume "25" on Storage Device "DVDWriter" (/dev/dvd) for Job BackupCatalog.2006-01-01_15.50.28