Quite high in comparison to hard drives but dropping

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Unformatted text preview: .5” disk drive •  •  •  •  •  •  •  •  •  •  •  31 May 2012 1Terabyte of storage (1000 GB) $100 4 plabers, 8 disk heads 63 sectors (512 bytes) per track 16,383 cylinders (tracks) 164 Gbits / inch ­squared (!) 7200 RPM 300 MB/second transfer 9 ms avg. seek, 4.5 ms avg. rotaKonal latency 1 ms track ­to ­track seek 32 MB cache Disks and File Systems 17 University of Washington Solid state drives: imminent disrup<on   Hard drives are based on spinning magne<c plafers   mechanics of drives determine performance characterisKcs sector addressable, not byte addressable   capacity improving exponenKally   sequenKal bandwidth improving reasonably   random access latency improving very slowly   cost dictated by massive economies of scale, and many decades of commercial development and opKmizaKon   31 May 2012 Disks and File Systems 18 University of Washington Solid State Driv...
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This document was uploaded on 04/04/2014.

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