SSD And The HDD Interface Limitations

• The HDD interfaces were designed with slow devices (rotating disks) in mind.
• As such, they introduce a very large latency on top of that of the FLASH memory of SSDs.
  • If an SLC FLASH memory can support a latency of ~25 micro-seconds to fetch a 4KB page.
  • The SAS or SATA protocols may add more then a 100 micro-seconds overhead.
• In addition, going via the system peripheral bus can limit throughput.

Originally written by guy keren