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CTOnews.com August 18 News, solid State disk (SSD) or traditional Mechanical hard disk (HDD) which has lower power consumption? CTOnews.com 's friends may answer "solid state drives" directly, but according to research by storage solution provider Scality, mechanical hard drives consume more power per unit of storage than SSD.

Scality said that the mechanical hard disk has more mechanical parts, such as disks and read-write heads, and the internal disks rotate at high speed while working, while the SSD has no mechanical structure and only reads and writes through electronic input. This also makes most consumers always think that SSD consumes less power and consumes less power than HDD.

Scality claims that they tested it with Micron 6500 ION 30.72TB QLC SSD and Seagate Exos X22 22TB 7200 RPM HDD, and the results show that the actual power performance of HDD per unit of storage capacity is better than that of SSD based on high-density QLC memory chips. However, Scality only tests power consumption, not storage performance such as read and write.

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

▲ source Scality compares the number of 1TB data / power consumption per watt, reading data-intensive work, HDD divides the two into 2.5, while the energy consumption of 2.1 1TB HDD is about 19% higher than that of SSD. However, in terms of writing data-intensive work, the division of the two values of HDD is 1.7, which is 94% lower than that of SSD. However, when idle, HDD consumes about 14% more electricity than SSD.

After querying, CTOnews.com learned that Scality used two models for testing, of which read data-intensive work was about 10% idle, 80% read and 10% write. Write data-intensive work includes 10% idle, 10% read, and 80% write. Each storage device is in the above power state and reaches the indicated percentage. So on the whole, the power performance of HDD is better than that of SSD. However, Scality also acknowledges that the results may change as storage capacity increases.

In addition, at present, power consumption has not become the main standard to determine the competition between SSD and HDD market, everything still depends on workload and cost. For example, SSD is still the best choice for "read-intensive" and "latency-sensitive" work, and HDD is the first choice for "unstructured data" work.

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