Display the Status of Your IOA Cache Batteries
I assume most of you are familiar with the I/O adapters that have cache batteries on them and the importance of monitoring the status of those batteries to ensure they are replaced before they fail. In case you’re not: the IOA has a cache to improve performance; the application doesn’t have to wait for the data to be written to the disk. The cache is powered by a battery in the IOA to ensure the cache data is preserved even if the IOA is powered off or reset. However, if the cache battery is failing, then the data is written directly to disk and the cache isn’t used, which can result in significant performance degradation. As such, you should know when the cache batteries are failing to get them replaced before it affects your application’s performance.
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