FortiGate-6501F or 6301F HA clusters support SSD (log disk) failure protection. SSD failure protection is disabled by default. You can use the following command to enable SSD failure protection:
config system ha
set ssd-failover enable
If SSD failure detection is enabled, if an SSD on the primary FortiGate-6501F or 6301F fails, an HA failover occurs and the FortiGate-6501F or 6301F with the most operating SSDs becomes the primary.
If an SSD fails on the secondary FortiGate-6501F or 6301F, its status in the cluster does not change. However, in future negotiations the FortiGate-6501F or 6301F with an the most SSD failures is less likely to become the primary.