Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Fri, Oct 23, 2009 at 03:21:49PM +0400, Michael Tokarev wrote: > Hello. > > Yesterday I installed drbd for the first time, to see > how it works. And almost immediately come across a > problem where I don't see an immediate solution. > > I followed the howto, built a resource, syncronized > it, created a filesystem on it, switched roles > (pri/sec) between two hosts, made it primary on > two nodes, did some writes etc. So far so good, > it all worked just fine. > > Next, I added "verify-alg sha1;" on both sides > and ran `drbdadm adjust' on both nodes. Next > I ran 'drbdadm verify'. > > There was no activity on the resource during > this time (between editing and running verify, > at least). > > Now, drbd declared a split-brain situation, > and refuses to work. > > I've no idea where the split-brain come from, > since the content should be identical on both > sides, and verify should've prove it. You adjusted network parameters (verify-alg), which we still cannot do while keeping the connection. So your first "adjust" to add the verify-alg had to disconnect ; then reconnect with new parameters. Don't do that while both are Primary. > I also don't have an idea what to do next, ie, > how to resolve the "conflict". Restarting stuff > does not help. There is a section about recovering from split brain in the DRBD User's Guide -- : Lars Ellenberg : LINBIT HA-Solutions GmbH : DRBD®/HA support and consulting http://www.linbit.com DRBD® and LINBIT® are registered trademarks of LINBIT, Austria. __ please don't Cc me, but send to list -- I'm subscribed