Simulation of a computer system with single and dual density discs
Mark A. Franklin, David Looney · Annual Simulation Symposium · 1973
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.