On 29/07/2019 10:34, Eddie Chapman wrote:
Hello,

I've managed to corrupt one of the drbd9 resources on one of my production servers, now I'm trying to figure out exactly what happened so I can try and recover the data. I wonder if anyone might understand what went wrong here ( apart from the fact that PEBCAK :-) )?

That was a very long email from me yesterday, most people don't have time for that, so actually let me boil it down to just this question:

Should I be able to run lvextend on a backing device of a live drbd resource, but then safely be able to abort everything and "down" the resource, without telling drbd to resize it or do anything to it? Or is it expected that doing something like that will lead to data corruption so just "Dont Do That"?

It's an important question for me to understand as I use drbd on a lot of servers and often do very advanced things with the layers below drbd. If I find myself in a similar situation again would be good to know for sure what is and is not expected behaviour.

Thanks,
Eddie
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