La Trobe University
The traditional Hard Disk Drive (HDD) is often a bottleneck in the overall performance of modern computer systems. With the development of Solid State Drives (SSD) based on flash memory, new possibilities are available to improve secondary storage performance. In this paper, the authors propose a new hybrid SSD-HDD storage system and a selection of algorithms designed to assign pages across an HDD and an SSD to optimize I/O performance. The hybrid system combines the advantages of the SSD's fast random seek speed with the sequential access speed and large storage capacity of the HDD to produce significantly improved performance in a variety of situations.