I'm running Backup Exec 10.d on a 2000 Server with a External LTO3 drive. We have opted to do full backups for each business day (Mon-Fri). This comes out to about 112 - 115Gb of data a night to backup on 5 different tapes - one for each day of the week. With a LTO3's native format this equates to at least 3 backups of a business day's data on a tape over 3 weeks. After that there is like 85 - 90Gb of space left on the tape - not enough for a full backup. My desired state is a backup scheme to where the tapes will append the 3 versions of that tapes backup day and then overwrite the tape so I am always assured of 3 weeks worth of backup protection.
My problem? Trying to get the correct retention scheme in my media set's properties. I've tried various combinations with little success. In that I can certainly fill the tape with my three weeks worth of data, but the tapes never become over-writable and append-able after they are full. Now up until Backup Exec I could have sworn that I was an intelligent administrator. :-)
Could I impose upon all of you who know more than I for some assistance with this? My dyslexia has me thinking that I need to set my append period for 15 day's (for the 3 full backups I can get on a tape) and an overwrite protection for six day's.
Your thoughts and comments are greatly appreciated.