Tape-vs-Disk - Disk and Tape Square Off Again Tape Remains...

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Disk and Tape Square Off Again Tape Remains King of Hill with LTO-4 Presented by Heba Saadeldeen
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Goal Decide whether the decreasing costs of disk subsystems and the increasing capacity of disk drives might have made the TCO for disk more attractive versus tape in the long-term storage of data. Study Period : 5 years. Size of enterprise: Data center of a mid-sized business
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How do they compare the cost of both disk and tape storage ? Store the 90 days worth of backup data on a disk (disk cache) to help meet the performance objectives defined in service level agreements. We will then save the 13th weekly full backup as the archived quarterly backup and save it to a disk system and to a tape system – to compare the TCO costs of each long- term storage solution . The cost comparison, over five years focuses on storing these “archived quarterly backups” on the two alternatives, disk and tape .
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Findings For long term storage, over the five year study period, the cost of disk is about 23 times that of the tape.
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