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DPM 2012 R2 single tape usage - protection group writing 3 times to tape

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Hi, we have a protection group with 3 long term recovery goals configured to a single tape drive. our goals:

  1. Every 1 Week on Wednesday 1pm with retention for 4 weeks
  2. Every 4 weeks on Wednesday 1pm with retention for 12 weeks
  3. Every 12 Weeks on Wednesday 1pm with retention for 1600 weeks (30yrs)

When the job runs each week on Wednesday at 1pm, it appears to be making a full backup on tape for each protected data source for each retention period. i.e. 3 full backups for each data source.

Has anyone else had this behavior or know how to fix it?

Cheers

Daniel


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