Full "freenas-boot" pool

[Dolbert]

Hello,
I have the problem that my boot pool is at 95% capacity and I don't exactly understand why.

Code:

root@freenas:~ # zpool list
NAME           SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP  HEALTH  ALTROOT
freenas-boot   222G   213G  9.28G        -         -      -    95%  1.00x  ONLINE  -

I tried to see what the issue is but I have the feeling that the below command s not actually helping as the pool is not mounted in a way that is easily accessible to me.

Show : du -hsx /boot/*

root@freenas:~ # du -hsx /boot/*
3.0K /boot/beastie.4th
7.5K /boot/boot
1.0K /boot/boot0
1.0K /boot/boot0sio
1.0K /boot/boot1
42K /boot/boot1.efi
48K /boot/boot1.efifat
7.0K /boot/boot2
2.5K /boot/brand-fbsd.4th
1.0K /boot/brand-FreeNAS.4th
2.5K /boot/brand.4th
2.0K /boot/cdboot
4.5K /boot/check-password.4th
2.0K /boot/color.4th
7.0K /boot/defaults
3.5K /boot/delay.4th
1.0K /boot/device.hints
3.0K /boot/dtb
4.5K /boot/entropy
2.8M /boot/firmware
3.0K /boot/frames.4th
49K /boot/gptboot
81K /boot/gptzfsboot
14K /boot/isoboot
31M /boot/kernel
32M /boot/kernel-debug
235K /boot/loader
260K /boot/loader_4th.efi
275K /boot/loader_lua
306K /boot/loader_lua.efi
201K /boot/loader_simp
222K /boot/loader_simp.efi
5.0K /boot/loader.4th
2.5K /boot/loader.conf
1.0K /boot/loader.conf.local
1.0K /boot/loader.rc
2.5K /boot/logo-beastie.4th
2.5K /boot/logo-beastiebw.4th
2.5K /boot/logo-fbsdbw.4th
1.0K /boot/logo-FreeNAS.4th
2.5K /boot/logo-orb.4th
2.5K /boot/logo-orbbw.4th
57K /boot/lua
1.0K /boot/mbr
5.5K /boot/menu-commands.4th
18K /boot/menu.4th
3.5K /boot/menu.rc
7.5K /boot/menusets.4th
22M /boot/modules
1.0K /boot/pmbr
1.0K /boot/pmbr-datadisk
235K /boot/pxeboot
2.5K /boot/screen.4th
2.5K /boot/shortcuts.4th
17K /boot/support.4th
227K /boot/userboot_4th.so
275K /boot/userboot_lua.so
2.5K /boot/version.4th
4.5K /boot/zfs
82K /boot/zfsboot

I had "freenas-boot" configured as the system dataset pool with the syslog switch being turned off. I have changed it to a different pool now but I don't have the feeling that it helped except from maybe stopping the pool from filling up even more.

I am on FreeNAS-11.3-U5 and my question now is how do I fix it and how do I prevent it from happening again.

 

[Dolbert]

I found the issue.
For some reason when I was doing backups to an external USB drive, the files went to a folder named /USB on the freenas-boot pool.