ALR0506W The Total Back-end I/O Rate of array, MDisk, or MDisk Group Array, MDisk, or MDisk Group name in storage system storage system name was measured to be measured value ops/s, which violated the defined warning-idle boundary value of boundary value ops/s.
Explanation
Total Back-end I/O Rate measures the average number of I/O operations per second for arrays, MDisks, and MDisk Groups. 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, MDisk, or MDisk Group in the storage system has a Total Back-end I/O Rate 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, MDisk, or MDisk Group. This can happen if the application(s) using the array, MDisk, or MDisk Group stopped working properly.
This type of threshold boundary should only be defined if the workload for the arrays, MDisks, or MDisk Groups 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.