Western Difgtal releases the Red Plus series of HDD to clearly state which drives use the SMR technology and which drives use the faster CMR technology.
WD Red Family for NAS – A Decade in Data – NAS Compares
Western Digital Green vs. Red Hard Drives
2017 Hard Drive Reliability by Drive Size and Brand
Western Digital Announces 22TB CMR and 26TB SMR HDDs: 10 Platters plus ePMR : r/hardware
Western Digital - Wikipedia
Western Digital Launches World's First 26 TB HDD, and 15 TB SSD : r/DataHoarder
WD Red SMR vs CMR Tested Avoid Red SMR - ServeTheHome
Your WD Red NAS Hard Drives Might Be Using SMR – What You Need To Know – NAS Compares
PSA: Beware of HDD manufacturers submarining SMR technology in HDD's without any public mention - Node Operators - Storj Community Forum (official)
WD introduces 'Red Plus' branding for non-SMR HDDs
SMR vs. CMR Hard Drives: Which Is Best For You? - History-Computer