@mauve
I've just learned, in case you are using ZFS, there's a dataset property refreserved one can use to create empty space on a drive for such conditions. At least that file system can still delete things when reserved, empty space is present.
Now that I think of it, maybe we too do need a sacrifice.txt
@mauve
I'm glad that works for your use cases.
In our situation as an ISP, the fs does quite some heavy lifting for us, why we must embrace it with all its ideosyncracies.