New headline: Storage company Scality reveals: Mechanical hard drive storage consumes less power and is more energy efficient than SSD

News from this site on August 18, which one has lower power consumption, solid state drive (SSD) or traditional mechanical hard drive (HDD)? Friends on this site may directly answer "solid-state drive", but according to research results from storage solution provider Scality, the power consumption per unit of storage of mechanical hard drives is better than that of SSDs. Scality company stated that mechanical hard disks have many mechanical parts inside, such as magnetic disks and read-write heads, and the internal disks will rotate at high speed during operation.

In contrast to SSD There is no mechanical structure, and reading and writing are only performed through electronic input and output. This also makes most consumers always think that SSD has lower power consumption and consumes less power than HDD.

Scality claims that they used Micron 6500 ION 30.72TB QLC SSD and Seagate Exos X22 22TB 7,200 RPM HDD for testing. The test results show that the actual power consumption performance of HDD per unit storage capacity is higher than that based on SSDs with higher density QLC memory chips have better power consumption performance. However, Scality only tested power consumption and did not test storage performance such as reading and writing.

▲ Picture source Scality Company It is reported that in terms of reading data-intensive work, Seagate’s HDD every The average power per unit of storage is 8.7W, which is 40% lower than the average power of Micron's SSD of 14.5W. In terms of writing data-intensive work, the average power consumption per unit of storage of HDD is 6.6W, which is 63% lower than the 18W of SSD

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▲ Picture source Scality Company Comparison of 1TB data/power consumption per watt, reading data-intensive work , HDD divides the two into 2.5, and SSD is 2.1. HDD consumes about 19% more energy than SSD. But for writing data-intensive work, the division of the two values ​​​​of HDD is 1.7, which is significantly lower than SSD’s 3.3 by 94%. However, in idle state, HDD consumes about 14% more power than SSD

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After inquiry, this site learned that Scality used two models for testing, in which read data-intensive work is about 10% idle, 80% read, and 10% write. Write data-intensive work consists of 10% idle, 10% read, and 80% write. Each storage device is in the power state described above and reaches the indicated percentage. So overall, the power consumption performance of HDD is better than that of SSD. However, Scality also acknowledged that results may change as storage capacity continues to increase.

In addition, power consumption is currently not the main criterion that determines the competition between SSD and HDD markets. Everything still depends on workload and cost. For example, SSDs are still the best choice for read-intensive and latency-sensitive work, while HDDs are the first choice for unstructured data work

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