Simulation of a computer system with single and dual density discs

Authors:
Mark Franklin;David Looney
Affiliations:
-;-
Venue:
ANSS '73 Proceedings of the 1st symposium on Simulation of computer systems
Year:
1973

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Abstract

The question of replacing a single density, two-channel, two-controller disc system with a less costly, plug compatible, dual density, single channel, single controller system having the same capacity is considered. A simulation model is designed to examine the effect of such a replacement on average transaction time, that is the time between issuing an I/O request and completion of the request. Although such a replacement results in an increase in transaction time, this increase may be tolerable if disc utilization is low. The effects of a special software change and of logical disc balancing are also investigated.