You are using RAID with a FortiAnalyzer that supports software RAID, and one of the hard disks on FortiAnalyzer has failed.
What is the recommended method to replace the disk?

A. Shut down FortiAnalyzer and then replace the disk
B. Downgrade your RAID level, replace the disk, and then upgrade your RAID level
C. Clear all RAID alarms and replace the disk while FortiAnalyzer is still running

D. Perform a hot swap

Reference: https://www.fortinetguru.com/2016/04/system-settings/6/