ALR0571E The Back-end Read Queue Time of MDisk MDisk name in storage system storage system name was measured to be measured value ms/op, which violated the defined critical-idle boundary value of boundary value ms/op.
Explanation
Back-end Read Queue Time measures the average number of milliseconds that each read operation for an MDisk spent on the queue before being issued to the back-end storage system. A threshold was defined on this metric, which causes the measured value to be compared to the defined boundaries for each set of performance statistics collected from the storage system.
This message indicates that a threshold boundary violation occurred. In this case, the specified MDisk in the storage system has a Back-end Read Queue Time that is less than or equal to the critical-idle boundary that was defined for the related threshold.
Action
The threshold violation might indicate an unexpected drop in the workload for this MDisk. This can happen if the application(s) using the array or MDisk stopped working properly.
It makes little sense to enable an idle boundary for the queue time thresholds, because a zero or low queue time is the ideal and expected situation. It is recommended to disable the idle boundary checking by leaving the idle boundary values blank in the related threshold definition.