Read/Write Speeds
The typical access time for a Flash based SSD is about 35 – 100 micro-seconds
Whereas that of a rotating disk is around 5,000 – 10,000 micro-seconds. That makes a Flash-based SSD approximately 100 times faster than a rotating disk.
HDD data transfer rate at the rate of 80 megabytes per second typically.
SSD data transfer rate at the rate of 170 megabytes per second typically.
Although SSD are slow when to compared to small file writes, they have a constant read and write rate.