Fault Tolerance and Data Restoration
Reliability of data storage and access is a critical need for many businesses today. Reliability of data storage can often be handled through the use of redundant array of inexpensive disks (RAID). RAID uses multiple hard drives and differing fault tolerant scenarios to ensure that data loss does not occur in the event of disk failure. There are five levels of RAID:
RAID 0— Used to provide a performance increase by allowing simultaneous read and writes through striping of data across multiple disks, RAID 0 provides no fault tolerance. If one disk fails, the data on all disks is lost.
RAID 1— Better known as mirroring, RAID 1 duplicates the data on one disk to another disk. RAID 1 is a fairly expensive solution ...
Get CISSP Training Guide now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
