BalenOsa Minecraft Server - /mnt/sysroot/active 100% full

[originally posted in reply to another post, which is prob not good etiquette, so starting new post here]

Hi,

I’ve had the Minecraft Server up and running on RPi 4 for a few weeks - thanks! I’d really appreciate some help - this morning, the MC server can’t be connected to, and looking at the dashboard:
image
both the mc-server and scp-server are ‘exited’. I’ve tried restarting the services, and rebooting the device, but neither start, the line 'Starting service ‘mc-server sha256:[etc]’ appears in the log window, but no further info.

Logged in via SSH, ran df -h :

Filesystem                      Size  Used Avail Use% Mounted on
devtmpfs                        817M     0  817M   0% /dev
tmpfs                           951M  4.0K  951M   1% /tmp
/dev/mmcblk0p2                  300M  286M     0 100% /mnt/sysroot/active
/dev/disk/by-state/resin-state   19M  395K   17M   3% /mnt/state
overlay                         300M  286M     0 100% /
/dev/mmcblk0p6                   28G  1.6G   25G   7% /mnt/data
tmpfs                           951M     0  951M   0% /dev/shm
tmpfs                           951M  9.2M  942M   1% /run
tmpfs                           951M     0  951M   0% /sys/fs/cgroup
/dev/mmcblk0p1                   40M  7.0M   33M  18% /mnt/boot
tmpfs                           951M   24K  951M   1% /var/volatile
/dev/mmcblk0p3                  300M  2.1M  278M   1% /mnt/sysroot/inactive

and it looks like a couple of the mounts are 100% full.

Anyone got any ideas about what might have filled it up (logs? cache? tmp files?)?

These are the top 5 directories by size in /mnt/sysroot/active, but I don’t know what to do with this information!

# du -a /mnt/sysroot/active/ | sort -n -r | head -n 5
290536  /mnt/sysroot/active/
290509  /mnt/sysroot/active/balena
267654  /mnt/sysroot/active/balena/overlay2
267643  /mnt/sysroot/active/balena/overlay2/593055c6eef95ad7a03154222980cd7984738ad21c9fa770bed29bb0106b4103
267641  /mnt/sysroot/active/balena/overlay2/593055c6eef95ad7a03154222980cd7984738ad21c9fa770bed29bb0106b4103/diff

Thanks in advance.

Hello, this is by design, the root FS is mounted read-only.