A database server supporting the company's finance application crashed because the RAID controller's cache-battery failed. You replaced the battery pack, allowed the array to finish rebuilding, and confirmed that all logical volumes are optimal.
To verify full system functionalityand implement a preventive measure before handing the server back to production, which action should you take next?
Boot the server into a memory-diagnostic utility for one full pass and disable write-back caching on the controller.
Restore the latest backup to a spare host and compare data hashes before returning the original server to service.
Export and clear the controller logs, leave the new battery charging for 24 hours, and keep the application offline during that period.
Have a finance power user run a complete transaction in the application, then configure automatic battery-learn cycles on the RAID controller.
Verifying full system functionality is best accomplished by letting the users who rely on the restored service exercise their normal workflows; they know whether the application truly functions end-to-end. At the same time, the newly installed RAID-cache battery should be protected from future unexpected failure by scheduling automatic battery-learn (calibration) cycles that most vendors recommend every 90 days. This single step both proves the application works for the business and establishes a routine preventive maintenance task.
The other choices either fail to confirm the application functions for users (running memory tests, restoring backups, or simply letting the battery charge) or do not add a meaningful preventive measure.
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