Overwrite Protection and multiple jobs to single tape
G'day All. We have an implementation of BE2010 utilising a single LTO3 drive for daily incremental, and weekly and monthly full backups. We are currently using multiple jobs with different selection lists to capture different data areas for our backups. We have three different media sets for each group of jobs with different overwrite protection periods for each. The daily media set has an overwrite period of 6 Days, the weekly 4 weeks and the monthly 1 year. I'm having some trouble understanding exactly how the overwrite protection periods work. There are some instances where the daily jobs will run one after another, happily writing to the same tape and other instances where after a job the media becomes overwrite protected and subsequent daily jobs fail. Is anyone able to shed some light on why this would be occuring? Also, if someone is able to clarify whether overwrite protection protects an entire tape, or simply the data from a job while allowing appends. I suspect it's the former, but if that's the case i don't understand how multiple jobs can ever run to a single tape with overwrite protection set. I appreciate any assistance given.