From mboxrd@z Thu Jan  1 00:00:00 1970
From: NeilBrown <neilb@suse.de>
Subject: Re: about:conf->recovery_disabled and  mddev->recovery_disabled
Date: Mon, 9 Apr 2012 10:03:29 +1000
Message-ID: <20120409100329.5eff419d@notabene.brown>
References: <201204071713172658588@gmail.com>
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To: majianpeng <majianpeng@gmail.com>
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On Sat, 7 Apr 2012 17:13:22 +0800 "majianpeng" <majianpeng@gmail.com> wrote:

> Hi all:
> 	I confused the recovery_disabled.
> 	what's the mean when conf->recovery_disabled =3D mddev->recovery_disable=
d?
> 	If equal,so not to add disk and not to recovery?

Yes, exactly.

in an attempt to recover a device fails we don't want to immediately retry =
as
that would cause a loop.
So whenever a recovery fails, we set conf->recovery_disabled to match
mddev->recovery_disable.  And whenever something changes which might make
recovery possible, we increment mddev->recovery_disabled, so that it tries
again.

With raid10, the 'recovery_disabled' is per-disk, not per-array.

NeilBrown

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