Future Directions
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File Caches
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Uses main memory as a cache for recently accessed files.
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Every Unix system now has file caches.
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RAID (Redundant Array of Inexpensive Disks)
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Increases throughput.
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Automatically recover from a failed disk.
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Helical Scan Tapes
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Records information at an angle to the tape (used in VCRs).
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Increases density and bandwidth.
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Compression for Tapes
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Robot Tape Libraries
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