Hi!

> 1. Does anyone know if Firebird + DRBD is a thing or am I ploughing my
> own furrow?

I have it working flawlessly for 5+ years here. DRBD + XFS + Firebird
Databases on 2 Cluster nodes with Heartbeat / Pacemaker.

> 2. Can anyone suggest a way that I could try to induce database killing
> activity via regular client access?

Sorry, no suggestions for you here.

> 3. We have a preference for Protocol B, are we mad?

I have always been using Protocol C, never experienced any performance
issues.

> Hopefully I'm not alone, although google thinks I am.

Nope, you are not.

hth,
Michael