Dell DR4000 - Manual (Page 34)

DR4000 Setup Guide for Backup Exec 2010 R3 v1.0
Define the retention period for the backup job.
Note: Dell’s “15x” deduplication claim is for average 12 week retention with multiple data types. Ratios
will vary depending on data type, frequency of backup and retention. Dedupe ratios will grow with
longer retention periods.