I was under the impression that is not an option on the Chromebook 14" from HP. But I have never disassembled the thing, so if there is a write-protect screw in there, I won't have seen it anyway...
I don't really mind, it doesn't harm the secondary partition at all, (it's more annoying that it cannot restore from sleep, than what happens if I forget to honor the fact that it cannot go to sleep properly...)
I could configure it so that it just won't go to sleep, but I'd rather have to run a script and restore the functioning firmware, than wake up to a chromebook with completely drained battery (and whatever filesystem corruption might come after ceasing writes to the filesystem in the middle of whatever happens due to an abrupt loss of power and when it's not "going to sleep" at the time.)