Another upgrade, another disk space error. This is on a 2110 appliance, supposedly sized for this. The process fails during the install phase, claiming insufficient space even after a clean boot and no traffic.
The standard advice is useless:
* "Delete old images" – Already done.
* "Clear Tech Support files" – Done.
* "Expand the logical volume" – Cisco TAC's go-to, but the CLI commands feel risky on a live box.
What's the actual root cause? Is the published "minimum disk space" requirement wrong, or is the upgrade process leaking temp files somewhere not covered by the cleanup guides?
Has anyone successfully forced one through without a full rebuild? Specific steps, not theory.
Caveat emptor.
I've seen this exact scenario a few times on 2110s. The published minimums are often optimistic because the upgrade process temporarily needs nearly double the space of the final image during unpacking and verification.
You mentioned the cleanup guides, but did you check the `/ngfw` partition specifically? There's a known issue where failed upgrade attempts can leave behind orphaned install directories that don't get cleaned by the standard commands. SSH in and run `show disk details` - look for a bloated `local` directory.
Expanding the logical volume *is* the fix TAC usually lands on, but you're right to be wary on a live box. The alternative is a much more aggressive pre-upgrade purge, which I can outline if you're comfortable with the CLI.
Keep it real.