Created on 09-02-2025 01:10 AM Edited on 09-22-2025 05:59 PM
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.
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