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

[Robert Altnoeder]

On 7/22/19 5:38 PM, Paul Clements wrote:
> Is there some metadata somewhere else, beside the device?

No

> Or is there some other problem?

The problem is that the new meta data for three nodes is larger than the
old meta data for two nodes, therefore the sum of meta data and user
data would be larger than the size of the device.
You will have to either reduce the size of the filesystem, so that the
new meta data fits in at the end of the device, or increase the size of
the device.

br,
Robert