Western Digital has developed a new technology that allows hard drives to go into low power mode without losing performance. The company’s Product Manager, Ahmed Shihab, states that this method maintains the expected performance level while significantly reducing energy consumption.

Traditional hard drives consume high amounts of energy even when they are not actively used. This does not create a sustainable structure for large-scale data centers.

Putting drives into sleep mode saves energy

The new technology eliminates the long waiting times of the past by accelerating the transition of drives to a low-power state. When disks go into sleep mode, they consume much less electricity, which directly reduces the operating costs of data centers.

Thanks to low power consumption, data center operators can place more drives in the same rack within their available power and cooling capacity. Western Digital states that the performance impact during this transition period is so low that it will not be noticed by most applications.

The company designed this technology to be compatible with existing software stacks, and customers do not need to make any major changes. Similar attempts in the past have failed in production environments due to delays in returning disks to full speed.

Western Digital’s new formula strikes a balance between power savings and availability, keeping latency below application timeouts. The company states that feedback from customers shows that there is intense interest in this technology.

A new layer of storage between fast and slow drives

This technology creates a new storage layer between high-performance SSDs and traditional archiving disks. Frequently accessed data is kept on active disks, while less critical data is directed to drives that go into sleep mode when idle.

The operating system and storage software decide at which layer the data will be stored. Since this innovation of Western Digital takes place entirely on the hardware side, it eliminates the need to wait for software updates.

The capacity increase is achieved through density rather than larger plates or new recording techniques. Using more drives with the same power budget means more terabytes per rack.

Western Digital claims to have solved a major problem in the industry by making the spin-down cycle so fast that no one will notice. Large-scale data center operators testing this solution will determine whether the technology will become widespread across the industry.

How effective do you think this new technology will be in reducing the energy costs of data centers?