If a hard disk on a FortiAnalyzer that supports software RAID fails, what is the recommended action?

In the context of FortiAnalyzer software RAID, when a hard disk fails, the procedure to shut down the device and replace the disk is important for a couple of reasons. First, replacing a hard disk while the device is powered on could lead to further data corruption or complications within the RAID array. Software RAID often requires disks to be replaced in a controlled manner to ensure the integrity of the data and to prevent any negative impact from the sudden removal of a disk.

Shutting down the FortiAnalyzer allows for a safe environment to handle the hardware. It minimizes the risk of disrupting the operation or corrupting the RAID management system that coordinates the disks. After safely replacing the failed disk, the system can be powered back up, allowing the RAID array to recognize the new disk and begin the rebuilding process as per the RAID configuration settings.

This approach aligns with best practices for dealing with hardware failures in RAID systems, ensuring minimal downtime and restoring redundancy in the array as quickly and safely as possible. Other options like rebooting the device or just replacing the disk immediately without a controlled shutdown might lead to potential data loss or additional complications in the RAID setup.