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Issue No. 12 - December (1974 vol. 23)
ISSN: 0018-9340
pp: 1269-1276
M.A. Franklin , Department of Electrical Engineering, Washington University
The question of replacing a single-density, two-channel, two-controller disk system with a cheaper, plug-compatible, dual-density, single-channel system having the same capacity is considered. An analytical model is explored to examine the effect of such a replacement on average response time, that is, the time between issuing an I/O request and completion of the request. Queueing theory is used to obtain curves of response time versus arrival rate, and the results are compared with corresponding curves obtained by a simulation model.
Disk arm contention, equipment replacement, M G 1 queues, queueing models, response times, single-and dual-density disks.

A. Sen and M. Franklin, "An Analytic Response Time Model For Single-and Dual-Density Disk Systems," in IEEE Transactions on Computers, vol. 23, no. , pp. 1269-1276, 1974.
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