Bug#784070: Newly-created arrays don't auto-assemble - related to hostname change?

[NeilBrown]

On Tue, Nov 22 2016, Andy Smith wrote:

> Hi Neil,
>
> On Tue, Nov 22, 2016 at 09:56:28AM +1100, NeilBrown wrote:
>> Thanks.  Sorry this is taking a lot of back-and-forth...
>
> No worries. This is very interesting to me and I'd also like to know
> what is going wrong even if I have a work-around.

Thanks.
I tried this on a scratch Debian VM I had lying around, and found I
could exactly reproduce your symptoms.
I found that, unlike on the first Debian system I looked at, there is a
line in  /lib/udev/rules.d/64-md-raid-assembly.rules 

  # Disable incremental assembly to fix Debian bug #784070
  GOTO="md_inc_end"

Remove that and the problem goes away.  Arrgg...

I wish people maintainers would *ask* upstream when they don't
understand, rather than just breaking things.

NeilBrown
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