BiTMICRO made a number of introductions and announcements in 1999 around flash-based SSDs including an 18 GB 3.5 in SSD. Fusion-io announced a PCIe-based SSD with 100,000 input/output operations per second (IOPS) of performance in a single card with capacities up to 320 gigabytes in 2007. At Cebit 2009, OCZ demonstrated a 1 terabyte (TB) flash SSD using a PCI Express ×8 interface. It achieves a maximum write speed of 654 megabytes per second (MB/s) and maximum read speed of 712 MB/s. In December 2009, Micron Technology announced the world's first SSD using a 6 gigabits per second (Gbit/s) or 600 (MB/s) SATA interface.
|PCI attached IO Accelerator SSD|
we can utilize SSD to replace normal HDD in OS for better performance while reading and writing IO will be involved.
Please note that SSD can achieve roughly 100,000 read/write per-second, which is about 10 micro-seconds per operation if data size involved is less than 7KB referring to the throughput of 712MB/s. This speed is still not comparable to read/write from DDR SDRAM. And Samsung has developed the first DDR4 RAM that is even faster.