Firmware Upgrade Paths

You can upgrade FortiAnalyzer from the latest version of 6.2 directly to FortiAnalyzer 6.4.2.

The following table identifies the supported FortiAnalyzer upgrade paths and whether the upgrade requires a rebuild of the log database. If you need information about upgrading to FortiAnalyzer 5.2, 5.4, 5.6, 6.0 or 6.2, see the corresponding FortiAnalyzer Upgrade Guide.

Initial Version	Upgrade to	Log Database Rebuild
6.2.0 or later	Latest 6.4 version	No if upgrade is from 6.4.0 or later Yes if upgrade is from 6.2.0 or later
6.0.3 or later	Latest 6.2 version, then to latest 6.4 version	Yes
6.0.0 to 6.0.2	Latest 6.0 version, then to latest 6.2 version	Yes

FortiGate units with logdisk buffer log data while FortiAnalyzer units are rebooting. In most cases, the buffer is enough to cover the time needed for FortiAnalyzer to reboot. However, Fortinet still recommends configuring multiple log destinations to ensure no logs are lost.

Fortinet Security Fabric

If you are upgrading the firmware for a FortiAnalyzer unit that is part of a FortiOS Security Fabric, be aware of how the FortiOS Security Fabric upgrade affects the FortiAnalyzer upgrade. You must upgrade the products in the Security Fabric in a specific order. For example, you must upgrade FortiAnalyzer to 6.4.0 or later before you upgrade FortiOS to 6.4.0 or later.