
"I would say it depends. SSD is very efficient and sustainable, per se. And focusing on scale, performance or power and endurance, it is really the future after HDD as the most popular storage subsystem. SSD is growing and further developing. So after HDD and SATA, with around 300MBps throughput performance, we are now talking about PCIe 5 or 6 [throughput of 256GBps for the latter]."
"Coming back to the question - how energy efficient is SSD? - we can say this really depends on the use case. We have different categories of storage - cold storage, warm storage, hot storage - and here the requirements are very different. Today, in datacentres or in hyperscalers, more than 80% of drives are HDD. So, SSD is nowhere near 100% replacing traditional technologies."
SSDs offer higher energy efficiency due to absence of mechanical components and silicon-based flash technology, enabling lower power consumption for many workloads. HDDs retain advantages in cost per terabyte and are widely used for cold and warm storage in datacentres and hyperscalers, comprising over 80% of drives. PCIe 5 and 6 interfaces dramatically increase SSD throughput, with PCIe 6 targeting 256GBps, enabling future SSD generations to deliver greater performance and new form factors. Use-case requirements such as access latency, scale, endurance, and space efficiency determine optimal choice between SSD and HDD.
Read at ComputerWeekly.com
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