Chapter 3. Storage Technologies

In this chapter, we are going to review the major storage technologies available in 2008. Of course, this section has a somewhat limited lifetime because of rapid evolution. However, some fundamentals remain the same, and we often use certain principles that were well established 10 years ago. Naturally, technology has improved, and will continue to improve in several dimensions: capacity, performance, and cost. The relatively recent appearance of serialized protocols such as SATA (Serial ATA) and SAS (Serial Attached SCSI) have changed the way storage can be configured. These protocols provided cheaper interconnects and more flexibility at a lower cost per GB.

First, we will review disk technology—the physical ...

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