Chapter 5. HETEROGENEOUS DISK PLATFORM SM SERVERS

To achieve the high bandwidth and massive storage required for multi-user SM servers, disk drives are commonly combined into disk arrays to support many simultaneous I/O requests, as described in Chapter 3. Such large-scale systems potentially suffer from two limitations that might introduce heterogeneity into their storage disk array. First, disks are mechanical devices that can fail. We will introduce the fault characteristics of disks and fault-tolerance techniques in Chapter 6. Because the technological trend for magnetic disk drives is one of annual increase in both performance and storage capacity (40% to 60% annually), it is usually more cost-effective to replace a failed disk with a new ...

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