ABSTRACT
This chapter describes products that offer fault tolerance at the system hardware level and those that use fault-tolerant methods to protect the integrity of data stored on network servers. It deals with a set of guidelines to help communications managers select the right type of fault-tolerant solution for their network. redundant array of independent disks (RAID) is a technology that is probably the most popular means of ensuring the integrity of corporate data, RAID is a way of coordinating multiple disk drives to protect against loss of data availability if one of the drives fails An innovative twist on the mirrored server, without its bug-sensitivity drawback, is Network Integrity’s LANtegrity product in which hard disks are not directly mirrored. Instead, there is a many-to-one relationship, similar to a RAID system, which has the advantage of lower hardware cost. LANtegrity handles backup by maintaining current and previous versions of all files in its Intelligent Data Vault.
