BE 20.5 maximize tape usage
We have:
- one single media server
- one library with 8 slots and 1 LTO6 drive
- We run a daily job to tape for incremental and a weekly job for full backup.
- Each full backup is less than 500 GB. So, 4 full backups fit onto single weekly tape.
- We use 4 weekly tapes and we can ensure that only one single weekly tape is in the library
Target: We want to use a different tape in each 4-week cycle to maximize tape usage.
Week 01 to 04: backup is written to corresponding tape 1 – 4 (first backup one each tape)
Week 5 to 8: backup is written to tape 1 – 4 (second backup appended on each tape)
Week 9 to 12: backup is written to tape 1 – 4 (third backup appended on each tape)
Week 13 to 16: backup is written to tape 1 – 4 (fourth backup append each tape)
Append period ends after fourth backup to tape and cycle starts again:
Week 1 to 4: backup is written to tape 1 – 4 (1st backup one each tape) because overwrite protection period has ended.
To achieve this we defined a media pool “weekly” and assigned to following parms:
Append period: 13 weeks
Protection period: 3 weeks
Would that fulfill our expectation as described above?
Thanx for any feedback