Troubleshooting Tip: How to troubleshoot issue related to insufficient flash disk when upgrading FortiManager/FortiAnalyzer VM firmware version

[jasonhong]

Description	This article describes how to troubleshoot issues related to an insufficient flash disk when upgrading FortiManager/FortiAnalyzer VM firmware version.
Scope	FortiManager-VM, FortiAnalyzer-VM.
Solution	The user can come across the following error message when attempting to upgrade FortiManager/FortiAnalyzer VM firmware version: 'New image is too big, please expand flash disk to 1028M or bigger.' This issue generally happens because there is insufficient flash disk storage for the new firmware image to be uploaded to FortiManager/FortiAnalyzer VM when performing the firmware upgrade. Below CLI output below shows the total flash disk size and its current usage. diagnose system flash list ImageName     Version                           TotalSize(KB)  Used(KB)  Use%  BootImage  RunningImage primary       FMVMK6-7.4-FW-build2588-241218    506252        338972    68%   Yes        Yes  To expand the flash disk storage, perform the following steps. Take a config backup of the FortiManager/FortiAnalyzer. Shutdown the FortiManager/FortiAnalyzer-VM. Expand the Disk 1 (or 0) by 1-2GB. Boot up the FortiManager/FortiAnalyzer VM and verify if the flash disk is automatically extended via the CLI command 'diagnose system flash disk' Perform the firmware upgrade by manually uploading the firmware image and verify if the error persist.