[xymon] DISK IGNORE useage

...

However… if I add to the host’s config a DISK IGNORE /, then while the text (as above) only shows /tmp, I lose /tmp’s graph line and it only graphs root. I’ve tried including the IGNORE line both before and after a line for /tmp, with no effect. As soon as I add the IGNORE line, /tmp’s graph line vanishes on next update.

Try this:

HOST=foo DISK %^/$ IGNORE

so you use a regex pattern that only matches "/" to ignore that filesystem.

I was expecting this to work - but now I have

Filesystem 1024-blocks Used Available Capacity Mounted on none 131072 15456 115616 12% /tmp

and below it, / is graphed. The graph line for /tmp vanished. I'm very confused.