ALR0502W The Disk Utilization Percentage of array array name in storage system storage system name was measured to be measured value%. This violated the warning-idle boundary value of boundary value%.
Explanation
Disk Utilization Percentage measures the approximate utilization percentage of the arrays in monitored storage systems. This value represents the average percent of time that the disks associated with the array were busy. 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 array in the storage system has a Disk Utilization Percentage value that is less than or equal to the warning-idle boundary, but greater than 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 array. This can happen if the application(s) using the array stopped working properly.
This type of threshold boundary should only be defined if the workload for the arrays in a storage system are guaranteed to always remain at a certain minimum level. Otherwise IBM Spectrum Control might recognize many violations, even though there is really no underlying problem with the applications. In these situations, consider decreasing the boundary value in the threshold definition, or disabling the boundary check by leaving the boundary value blank.