The number of bad sectors has increased on Drive 3 of RS2416RP+. We recommend running an extended S.M.A.R.T. test on this drive and replacing it when necessary. <https://kb.synology.com/DSM/tutorial/How_to_diagnose_drives_health_status_when_receiving_bad_sector_warning> Drives with bad sectors are more likely to be damaged than those without bad sectors. Drive information Brand: WDC Model: WD4002FYYZ-01B7CB0 Capacity: 3.6 TB Serial number: K4J2HH1B Firmware: 01.01M02 Bad sector count: 52 Sign in to store241-1 (if not already) for more information. From store241-1