I'm aware that ESXi maintains two copies of its boot partition,
/altbootbank, and that
/altbootbank is more or less a backup copy of
/bootbank, which is the running copy.
What I'm not clear on, and haven't ever seen documented is:
/altbootbankis used instead of
/bootbankis overwritten or if booting is just done from
/altbootbankwhen it's deemed necessary
- Under what circumstances
/altbootbankmight be updated (i.e. is it always a "factory reset" copy of
/bootbankor might it be refreshed - presumably by copying from
/bootbank- under some set of circumstances, other than manual intervention)
I would assume that the answer to (1) is "when booting from
/bootbank results in an error", but what would happen here? Would the user see any evidence that this had occurred, or need to intervene?
Can anyone enlighten me on one or more of these points? Is there a document somewhere that explains it all?