[DRBD-user] DRBD 9: 3-node mirror error (Low.dev. smaller than requested DRBD-dev. size.)

[Paul Clements]

> My guess what's happening here is this:

> Either the local node or some remote node that it can still successfully
> connect to while initializing the local DRBD was either not stopped, or
> the DRBD kernel module on it did not stop the resource successfully.
> Therefore, some node still had size information from the original 71712
> MiB volume with only one peer slot (a 2 node cluster configuration).

Yes, that was probably it. After rebooting, the mirror created successfully.

Alas, linux gets more and more like windows every day...

Thanks to everyone who helped.

--
Paul