How often is the Son backup performed? 05/21/2017 – by Mod_GuideK 0 In the GFS backup tape rotation plan, how often is the Son backup performed? A. daily B. weekly C. monthly D. quarterly SHOW ANSWERSCorrect Answer: A Explanation/Reference: Industry Standard Architecture – Student Guide 2 – Page 302 GFS backup requires the following: Monthly grandfathers Weekly fathers Daily sons Download Printable PDF. VALID exam to help you PASS.