Hello,
Backup Exec will choose the media for backup depending upon how the following parameters are set:
1. Overwrite Protection Period
2. Append Period
3. Overwrite Protection Level
Refer to the following TechNotes for more information:
http://seer.support.veritas.com/docs/192265.htm
The above TechNote explains, "The basics of Advanced Device and Media Management for VERITAS Backup Exec (tm) for Windows Servers."
Also, please refer to the following TechNote:
http://seer.support.veritas.com/docs/237374.htm
The above TechNote explains, "An explanation of the "Overwrite Protection Period" and the "Append Period"
Thanks,
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