HDDs offering up to 554 MB/s.
In May 2021, Seagate presented its Mach.2 Exos 2X14 hard drive, the fastest in the world. The company only offered it, at the time, in a 14 TB capacity. Seagate quietly added two new capacities by introducing the Exos 2X18: 16 TB and 18 TB.
This Seagate Exos 2X18 series actually includes six models: two 18TB and two 16TB hard drives in standard form factor, using SATA 6 Gbit/s and SAS 12 Gbit/s interfaces, and one of each capacity in SED form factor with SAS interface. In terms of performance, the spec sheet lists up to 554 MB/s for SAS models and 545 MB/s for SATA models. All four drives have random read and write speeds of 304/560 IOPS respectively and an average latency of 4.16ms.
Two 8TB or 9TB drives
The design does not change from the Mach.2 Exos 2X14. They are still dual actuator discs with conventional magnetic recording and a rotational speed of 7,200 rpm. They consist of two hard drives sealed in helium-filled enclosures; simply, the capacities of these internal disks increase to 8 and 9 TB against 7 TB for the Mach.2 Exos 2X14. The cache is still 256MB.
Power consumption in standby mode increases slightly, with 7.8W / 8W (SAS / SATA) against 7.2 W for the 14 TB drive. Under full load, these Mach.2 gobble up up to 13.5W / 13.1W (SAS/SATA). Naturally, these models benefit from and support Seagate technologies for the data center, including PowerChoice (to manage power consumption in standby mode), PowerBalance (to manage power consumption in active mode) and support for plugging in to hot.
As you will have understood, these Exos 2X18 drives are mainly intended for data centers. Consequently, the company does not disclose their price, which fluctuates greatly depending on the volumes and configurations chosen.
Source: Seagate via StorageReview