I posted the same problem an May, 31.
Now it’s back…
I’m running hass.io on a raspberry.pi
‘Suddenly’ the file system changes in to read only.
I can describe the circumstances.
I was logging in to hass.io with a ‘distant’ machine, using a zerotier connection.
I edited configuration.yaml, tested the file and rebooted the raspberry pi.
It works fine: the changes I made are reflected in the dashboard.
Then I edited automations.yaml.
If I try to save the changes, I get the horrible Errno 30 - read only file system
I can log in to hass.io by ssh.
I can find the /etc/fstab, but I can’t edit it… because the file system is read only.
By the way this is the fstab-file
core-ssh:/etc# cat fstab
/dev/cdrom /media/cdrom iso9660 noauto,ro 0 0
/dev/usbdisk /media/usb vfat noauto,ro 0 0
For now, I shall do what I did last time… just make a new SD-card and start all over again…