■ Large-capacity HDD for servers and data centers, CMR is used as the recording method This is a 3.5-inch SATA HDD for data centers that develop large-scale cloud services. It is a model that realizes large capacity and power saving by helium filling and high-density mounting design, and the number of disks is nine. In addition to adopting CMR (Conventional Magnetic Recording) as the recording method, it is equipped with an RV sensor that detects rotational vibration. The basic specifications are a disk rotation speed of 7,200 rpm, a buffer size of 512 MiB, MTTF of 2.5 million hours, and an annual workload of 550 TB. The sector format is 512e and the maximum continuous data transfer rate is 248MB / s. Weight is 720g.