You may receive the following error when trying to upgrade the firmware of a NetScaler: “Error: No space left on /flash/ filesystem, aborting
“Error: No space left on /flash/ filesystem, aborting installation…”
“installns: : Error: No space left on /flash/ filesystem, aborting installation…”
Citrix article CTX133588 documents how to free space from directory /var but freeing space from /var does not resolve the issue. Check space by using Putty, and run the following commands:
As you can see, the /flash directory is practically full. Most likely contains previous firmware updates.
Navigate to the /flash directory and delete previous firmware versions. In our example, we are utilizing WinSCP for those that prefer a GUI option.
Execute command df -h to check available free space and proceed to upgrade the firmware. Most likely, capacity should be quite less than 90%, the above example shows capacity at 98%.