0 Bytes free in bootflash of Catalyst 9400

[rzergoi]

On some of our Catalyst 9400 Switches running on version 17.3.4 we observed that the switch reports 0 bytes free space in bootflash.
11250098176 bytes total (0 bytes free)
But there should be plenty of space left according to the files present. "install remove inactive"- doesn´t find anything to delete.
Deleting some logfiles doesn´t help, the switch still reports 0 bytes free.

What I have found with  "dir /r" is that an affected switch has more than 60.000 files in folder sdavc, compared to 30.000 in a not affected switch. Which leads to NBAR.

Disabling NBAR with the command "no avc sd-service" immediately helps.

11250098176 bytes total (9659465728 bytes free)

[balaji.bandi]

I have used on ASR but used external SSD for testing, try Cat 9400 you can install SSD.

[Leo Laohoo]

delete /f /r crashinfo:/tracelogs/*.gz

[rzergoi · Accepted solution]

There are no crash files.

The problem is solved by disabling NBAR, doing an upgrade (as there is space in flash again) and re-enabling NBAR.

Because many of our switches were affected, I assume that others have the same problem.
I posted this to inform the community, as I haven´t been able to find any information about this.