"It's clear that every interface has its own advantages and shortcomings. SCSI means reliability and high performance, but also high price. Moreover, it needs a costly controller. IDE means huge capacities and much lower storage cost for 1MB than in SCSI HDDs. But IDE drives are much less reliable and to build a fault-tolerant disk subsystem you need to combine them into mirror RAID arrays (and this requires at least one more drive and a RAID-controller)."
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