[Pacemaker] drbd diskless -> failover to other node

[jimbob palmer]

>> Are you saying that if a server loses its disk, it will transparently
>> write to the secondary server without any need to failover at all?
>
> Yes. As long as it still has a network connection to the peer, of course.
>
>> WOW. I never knew DRBD did this. This is a _fantastic_ feature :)
>
> Well, that's what diskless mode is really all about.
> http://www.drbd.org/users-guide/s-handling-disk-errors.html

A final question: does DRBD switch to Protocol C in diskless mode, or
does it stay with the configured Protocol? If it doesn't switch, can
it be configured to?