Seagate: We Are Shipping 22TB HDDs | Tom's Hardware
Buy HGST 22TB Ultrastar DC HC570 SAS 12Gb s Base SE 3.5" Internal at Connection Public Sector Solutions
Amazon.com: Western Digital 22TB WD Gold Enterprise Class SATA Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD221KRYZ : Electronics
Western Digital 22TB 3.5” SAS3 HDD-A22T-WUH722222AL5204 Internal Enterprise Hard Drive
WD Red Pro WD221KFGX 22TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive - Newegg.com