Is it necessary to power off the FortiAnalyzer device to replace a failed drive when RAID is supported?

When a FortiAnalyzer device is configured to use RAID, particularly in a RAID setup that supports hot-swapping or hot-plugging, it is not necessary to power off the device to replace a failed drive. This feature allows for the replacement of hard drives while the system continues to operate, ensuring that there is minimal disruption to service and continuous access to data.

Hot-swappable drives are designed to be removed and replaced without the need for powering down the system. This capability is crucial for maintaining high availability in environments where uptime is critical. Therefore, the ability to replace a failed drive while the system is still running enhances operational efficiency and reduces downtime, making it the preferred approach in most scenarios involving RAID configurations.

In contrast, scenarios where power-off is required typically occur in situations where RAID is not configured to allow for hot-swapping, or if the drives do not support this function. Thus, the assertion that it can be done while the system is up and running remains valid for supported RAID configurations, making this the correct answer.