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Veritas Overwrite and appendable media?

Posted on 2010-09-23
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Last Modified: 2012-05-10
Quick question that has been bothering me for a long time.

I have overwrite and appendable media options. I want to keep data for 3 days guaranteed so I put 3 days for the overwrite protection. Thats easy, however, for the appendable media, I want anything after three days to be overwritten so the storage doesn't fill up and crash.

Usually I use Infinite, allow append for the append period however, this seems to work but was a little backwards sounding. Am I doing this correctly?

Also, there is another setting on the job properties under "Device and Media" called "Append to media, overwrite if no appendable media is available"

This is all sort of a brain twister. If someone can clear this up that would be great.

Thanks again guys/girls.
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Question by:snyderkv
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by:zeb2100
ID: 33749015
Infinite append is correct.  All that means is the backups will write to the media until it is full and then move to the next appenable media. The media will only be overwritten if no appendable media is available.
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by:snyderkv
ID: 33750770
So on the job properties, what is that setting for when the job starts "overwrite and append and cancel job if no appendable media is available"?
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zeb2100 earned 2000 total points
ID: 33755577
I have never used that setting, but my guess is that if there is no appendable media, and the overwrite protection period is still in effect, the job will  cancel.  In my setup I have a LTO4 tape library with 15 tapes.  I set the overwrite protection period for 10 days, and append to infinite append.  In the job properties  I choose Append to media, overwrite if no appendable media is available.  So what happens in my case the first tape is written to until it is full, and then it moves to the second tape.  By the time the last tape is full the overwrite protection period has passed, and the first tape is overwritten.  So I basically do not have to rotate any tapes out.  Hope that helps.
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