From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mikael Abrahamsson <swmike@swm.pp.se>
Subject: Re: How assemble this array? All devices listed as spares and busy.
 Huh? Unclear what this means.
Date: Mon, 27 Jun 2016 20:18:37 +0200 (CEST)
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To: dave dowless <ddowless@gmail.com>
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On Mon, 27 Jun 2016, dave dowless wrote:

> I ended up rebooting, but a force assemble returns all devices are busy. 
> What gives?

That typically indicates that the array is already running. "mdadm --stop 
/dev/mdX", and try again.

There should be nothing in "cat /proc/mdstat" when you do assemble.

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se