One or more aspects of the present disclosure relate to predicting one or more performance metrics of a storage array configuration. In embodiments, a storage array configuration can be generated based on one or more array-configuration related parameters. In addition, IO workload metrics corresponding to an IO workload received by an array corresponding to the storage array configuration can be recorded. Further, at least one response time (RT) prediction can be generated based on the IO workload metrics. Accordingly, another storage array configuration can be generated based on the RT predictions and according to performance requirements defined by a service level objective (SLO).