Western Digital today announced the industry's highest capacity HDD, the 15 TB Ultrastar DC HC620 host-managed SMR HDD. The Ultrastar DC HC620 delivers an unprecedented capacity point with a time-to-... Western Digital Announces 15TB Ultrastar DC HC620 HDD
It's not because they use 600mb/s interface, that they use this speed. In heavy stripping Raid it do better but not as fast (even with dedicated controler with huge cache) Seagate can go this way with SSHD in some case (that they used for the promo ), but in real life it's not performing much than a standard HDD. Also HDD are for mass stockage (like the Seagate 15To or this one), because SSD don't go with this size, for everything less than 4To in single unit: SSD *edit* the Ironwolf PRO 14To with 267mb/s at max is the fastest HDD from Seagate.