Video and Media Servers: Technology and Applications, Second Edition
An excellent practical guide, this second edition continues to provide a technical understanding of professional digital video recording systems.
TABLE OF CONTENTS Video and Media Servers: Technology and Applications, Second Edition
Chapter 37: Solid State Disks
Overview
Traditional disk storage has not kept pace with processing power performance. As computer power continues its upward spiral, Moore's Law holds merit but it doesn't seem to apply to magnetic disk storage. In mid-1995, it was stated that magnetic disk performance was only increasing at about 5 percent per year while CPU power is doubling every year.
True, by 1996 and even more in later 1997, the intense I/O operations-based applications continued to escalate with every new product or software package. To avoid what might actually be a plateau in overall system throughput, the search continues for improved disk I/O performance that is comparable or beyond that of SCSI-based systems.
Of equal importance are backup, protection, and data integrity for computer storage activities, as exemplified by the profundity and desirability of RAID control architectures. In this chapter, we will look at a rebounding solid state disk technology that has had an expensive and not particularly attractive record of accomplishment at least until now. We will examine how this technology might find its way into the growing media server marketplace and why it remains a complicated and seldom implemented storage subsystem.
Disk Cache Basics
The mainframe market of the '80s pushed forward a demand for data transfer speed. As the boundaries of system processor memory gave way to more intense disk/data activities, the notion of a solid state disk emerged. This then-conceptual technology was quickly subdued as cost and volatility made it nearly impossible to integrate solid state disk subsystems into even...
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