In my humble opinion, drbd does't crash if you loose network connections. :-)
Would be a first in history.
Maybe heartbeat puts both sources to primary and when they join you got split brain.
In this case you didn't set up heartbeat correctly.

Regards,
M.

On 27, Jul2009, at 1:47 PM, Heiko wrote:

Hello,

i have to convince my boss that our server crashes i reported on this list are due to a non exsiting dedicated line! We have all our drbd traffic routed through switches
and they often just crash.

Now I have to create a test setup to show them that when I plug the corg/shutdown the networkdevice
the machines tend to crash.
Since I dont have any spare machines I would like to use loopback devices, are these supported by now? I found some list entries that say this is not supported by drbd!
would this be enough to get the machines crashing?
We use drbd8.0 and 8.2 and have on both these crashes.


cheers.
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