As the storage industry becomes increasingly independent of the computer system industry, storage alternatives are becoming more complex. System administrators, as well as managers who make storage purchase and configuration decisions need to understand on-line storage alternatives. Awareness of what RAID can and cannot do for them helps managers make informed decisions about on-line storage alternatives. Users of networked personal computers may also be concerned about the quality of the storage service provided by their data servers. The material in this paper can help make the personal computer user aware of the significance of available storage alter-natives. Moreover, the first desktop RAID systems have already appeared on the market. As disk size and cost continue to decline, widespread use of RAID on the desktop is only a matter of time.
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