Understanding Fault Tolerance

A single point of failure is any component within a system that may cause a significant outage if it fails. Fault-tolerance controls help eliminate outages from single points of failure by adding redundancies. If a system develops a fault, the system can tolerate the fault and continue to operate. Fault tolerance is often added for disks, servers, connections, and sites.

imageNOTE This section covers fault tolerance for disks, servers, and connections. Chapter 12 covers hot sites, cold sites, and warm sites and how they can provide fault tolerance for entire locations.

Fault Tolerance for Disks

Redundant Arrays of Inexpensive ...

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