SSDs had origins in the 1950s with two similar technologies: magnetic core memory and charged capacitor read-only storage (CCROS).[11][12] These auxiliary memory units (as contemporaries called them) emerged during the era of vacuum-tube computers. But with the introduction of cheaper drum storage units their use ceased
Enterprise flash drives (EFDs) are designed for applications requiring high I/O performance (IOPS), reliability, energy efficiency and, more recently, consistent performance. In most cases, an EFD is an SSD with a higher set of specifications, compared with SSDs that would typically be used in notebook computers. The term was first used by EMC in January 2008, to help them identify SSD manufacturers who would provide products meeting these higher standards.[32] There are no standards bodies who control the definition of EFDs, so any SSD manufacturer may claim to produce EFDs when they may not actually meet the requirements.
In the fourth quarter of 2012, Intel introduced its SSD DC S3700 series of drives, which focuses on achieving consistent performance, an area that had previously not received much attention but which Intel claimed was important for the enterprise market. In particular, Intel claims that at steady state the S3700 drives would not vary their IOPS by more than 10–15%, and that 99.9% of all 4 KB random IOs are serviced in less than 500 µs
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