Data Redundancy Using RAID
RAID is a type of storage that utilizes multiple disks to provide data redundancy and high availability of that data. Few things are more important to a company than its data. It's your job as a system administrator to protect that data, and RAID is one of the most powerful tools you can use for achieving that goal. RAID offers several levels of protection. Each RAID level is designated by a number that indicates the amount of redundancy that level provides. The most common and practical levels are 0, 1, 4, and 5.
RAID-0 doesn't provide any redundancy (thus the zero designation). It instead spreads, or stripes, data across multiple disks to increase capacity and enhance performance. Chapter 11, “Performance Tuning and ...
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