This is because the data is written directly to the disks for all of the operations performed on the system. If the cache battery fails, the data is written directly to disk, which causes the system performance to be slower. The cache acts as a pail for data before the data is written to the disk drives to provide a more optimal system performance. The cache battery keeps the card working in the event of a power failure. The cache card works in synch with your disk drives. If the drives are in DEGRADED status, this probably means that the IOA cache battery has failed. Run the WRKDSKSTS command, then press the F11 function key to determine the Status of the drives. To further troubleshoot, do the following: Solution: The problem description is indicating that the busy drives are the culprit that is causing the system slow down. However, the WRKDSKSTS command shows that the drives are extremely busy (over 40%). The overall CPU usage on the system is relatively low and there are no issues with high page faults with memory. Problem: Users are complaining that for the past couple of days the batch and interactive workload have been running very sluggish.
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