Western Digital to Demo Twin-Actuator HDDs Subsequent Week: Double the Actuators for Double the Perf
Western Digital introduced this week that will probably be demonstrating its first two-actuator arduous drives on the OCP summit subsequent week. WD is the corporate's first push for multi-actuator drives and expects its two-actuator arduous drives to double the efficiency of standard single-actuator drives, albeit with plenty of power effectivity.
Whereas enterprise and near-line disk capacities of 7200 RPM have steadily elevated, the bodily disk I / O efficiency of those drives has remained at round 80 IOPS per drive. Which means that as a result of elevated capability, the IOPS efficiency ratio of the drives per TB will lower, which is very problematic when studying IOPS. This makes it more and more tough for information middle operators to satisfy their service degree agreements and high quality of service necessities.
To counter this, one of many easiest methods to extend drive efficiency and throughput is to extend the variety of particular person actuators in order that the actuators can deal with considerably twice as many I / O operations concurrently. Each Seagate and Western Digital have developed their HDDs with a number of actuators for fairly a while. The previous demonstrated a working twin drive in March of final 12 months, the second will present its twin-actuator prototype subsequent week.
Western Digital has excessive expectations for its HDDs with two actuators. The corporate expects the brand new drives to supply double the sustained switch charges and double the IOPS in comparison with present drives. If we use present drives as a base, which means information charges within the order of 500 MB / s and 160 ~ 200 IOPS. Though no official figures have been launched earlier than its official launch subsequent week, the corporate launched a photograph of its prototype with two actuators.
The drawback of Twin Actuator know-how is that these arduous drives primarily encompass two arduous drives in a single chassis and due to this fact devour extra energy than standard arduous drives. Nonetheless, it’s nonetheless 26% lower than two unbiased arduous drives, as it’s nonetheless a single set of disks. For instance, Western Digital's Ultrastar 14TB SATA Onerous Drive consumes 7.6W in working mode, and a pair of such arduous drives can be 15.2W. A hypothetical two-actuator arduous drive that consumes 26% lower than these two , would finish at 11.25 W, which is usually inside the efficiency limits of a typical three.5 "SATA slot (sometimes as much as 12W).
In the mean time, Western Digital doesn’t announce when it plans to commercialize its Twin Actuator HDDs. As an alternative, the corporate now emphasizes that it's all a few know-how demo. Nonetheless, we hope the corporate will make clear its plans subsequent week.