Shestakov wrote:Media Set
is a set of tapes used for continuously writing backup data. Please check the hyperlink for more info.
But I can't write any data to a tape unless it's part of a media set can I, even if I never continue writing onto a second tape?
pshute wrote:And why do I need to set the retention period? The previous tape should be safely out of the drive by the time the next backup is scheduled. Is that to guard against accidental overwriting? Or is it just something that is necessary with autoloaders?
If you store your tapes offline after the job is finished, you don`t need that option. Media set protection is needed if you leave the tapes in the media pool and don`t want them to be overwritten.
When you say "leave the tapes in the media pool", do you mean leaving them physically in an autoloader, or in the media pool defined by the software? I have a media pool called "Weekly tapes", and of course I want them to be overwritten next month, but for one day I want to be able to append a couple of jobs to a single tape.
I asked if there's a way to see what's on a tape. If you can tell me that then I can experiment and work out how all this works by trial and error. At the moment I'm just not confident of what will happen.