From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wols Lists <antlists@youngman.org.uk>
Subject: Re: mdadm stuck at 0% reshape after grow
Date: Thu, 7 Dec 2017 20:31:59 +0000
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To: Andreas Klauer <Andreas.Klauer@metamorpher.de>
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On 07/12/17 17:40, Andreas Klauer wrote:
> On Thu, Dec 07, 2017 at 02:58:32PM +0100, Andreas Klauer wrote:
>> Perhaps it's an intermittent error specific to your smartctl version?
> 
> Looking at the source code, it seems to be a case of:
> 
>     sct supported, erc unsupported - exit 4 (fail)

That's fine - fail is detected, kernel timeout is set to 180

>     sct unsupported as a whole     - exit 0 (success)

WHOOPS. Setting erc fails, so the command reports success!
> 
> So some drives will give the wrong exit code for this command.
> 
> Should probably be reported as a bug to smartmontools.

Sounds about right.

Cheers,
Wol