On Wed, Aug 14, 2019 at 09:53:21AM +0200, Jamie wrote:
> Hm, I'm taking a wild guess here and say that I will also have to upgrade to
> drbd 9 on the server where my secondary is placed? Or would that not be a
> problem, just upgrading on my computer and then not upgrading the server.
> The problem here ist, that we're five people running our primary virtual
> machines on our computers and have only one server where the secondary vms
> are kept. Would we all need to upgrade, or is it just enough that I upgrade
> the drbd on my computer now and wait with upgrading the server until
> everyone has upgraded their drbd? Do you guys have any experience with that?

I would switch all at the same time. 8.4 to 9.0 was anticipated to be a
thing, but it never was. Customers switching to 9 started from fresh
or created a 9 resource and copied the data. Connecting 8.4 to 9.0
should be possible, but I'd say it is pretty untested. I'd try to avoid
it.

Best, rck
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