@sandie
Cleaning up boot environments also resolved this issue on a Netgate 4100. It would be great if they caught the issue and provided better error message, or remove old boot environments that are over a year old. Went from 1.9GB of free disk space to 4GB of usable space.
for others seeing this issue.
this output was during the clean up process, there were several more entries at the start, but weren't in my buffer anymore.
[25.07.1-RELEASE][root@pfSense.home.arpa]/root: df -h
Filesystem Size Used Avail Capacity Mounted on
pfSense/ROOT/default 3.2G 1.3G 1.9G 40% /
devfs 1.0K 0B 1.0K 0% /dev
pfSense/var 1.9G 3.5M 1.9G 0% /var
pfSense/tmp 1.9G 888K 1.9G 0% /tmp
pfSense/home 1.9G 96K 1.9G 0% /home
pfSense/var/db 5.9G 4.0G 1.9G 68% /var/db
pfSense/var/log 1.9G 4.1M 1.9G 0% /var/log
pfSense/var/cache 1.9G 96K 1.9G 0% /var/cache
pfSense/var/tmp 1.9G 112K 1.9G 0% /var/tmp
pfSense/ROOT/default/cf 1.9G 1.7M 1.9G 0% /cf
pfSense/ROOT/default/var_cache_pkg 2.3G 402M 1.9G 17% /var/cache/pkg
pfSense/ROOT/default/var_db_pkg 1.9G 7.9M 1.9G 0% /var/db/pkg
tmpfs 4.0M 140K 3.9M 3% /var/run
devfs 1.0K 0B 1.0K 0% /var/dhcpd
[25.07.1-RELEASE][root@pfSense.home.arpa]/root: bectl list
BE Active Mountpoint Space Created
auto-default-20240314022141 - - 627M 2024-03-14 02:21
default NR / 5.01G 2025-09-13 14:18
default_20240413162830 - - 29.8M 2024-04-13 16:28
default_20240413162830_20240413162833 - - 532M 2023-05-22 16:08
default_20250913141802 - - 822M 2025-01-21 10:06
[25.07.1-RELEASE][root@pfSense.home.arpa]/root: bectl destroy default_20240413162830_20240413162833
[25.07.1-RELEASE][root@pfSense.home.arpa]/root: bectl list
BE Active Mountpoint Space Created
default NR / 4.07G 2025-09-13 14:18
default_20240413162830 - - 1.06G 2024-04-13 16:28
default_20250913141802 - - 822M 2025-01-21 10:06
[25.07.1-RELEASE][root@pfSense.home.arpa]/root: df -h
Filesystem Size Used Avail Capacity Mounted on
pfSense/ROOT/default 5.4G 1.3G 4.1G 24% /
devfs 1.0K 0B 1.0K 0% /dev
pfSense/var 4.1G 3.5M 4.1G 0% /var
pfSense/tmp 4.1G 240K 4.1G 0% /tmp
pfSense/home 4.1G 96K 4.1G 0% /home
pfSense/var/db 8.1G 4.0G 4.1G 50% /var/db
pfSense/var/log 4.1G 4.1M 4.1G 0% /var/log
pfSense/var/cache 4.1G 96K 4.1G 0% /var/cache
pfSense/var/tmp 4.1G 112K 4.1G 0% /var/tmp
pfSense/ROOT/default/cf 4.1G 1.7M 4.1G 0% /cf
pfSense/ROOT/default/var_cache_pkg 4.5G 402M 4.1G 9% /var/cache/pkg
pfSense/ROOT/default/var_db_pkg 4.1G 7.9M 4.1G 0% /var/db/pkg
tmpfs 4.0M 140K 3.9M 3% /var/run
devfs 1.0K 0B 1.0K 0% /var/dhcpd/dev