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From: NeilBrown <neilb@suse.de>
To: majianpeng <majianpeng@gmail.com>
Cc: linux-raid <linux-raid@vger.kernel.org>
Subject: Re: about:conf->recovery_disabled and  mddev->recovery_disabled
Date: Mon, 9 Apr 2012 10:03:29 +1000	[thread overview]
Message-ID: <20120409100329.5eff419d@notabene.brown> (raw)
In-Reply-To: <201204071713172658588@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 = mddev->recovery_disabled?
> 	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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  reply	other threads:[~2012-04-09  0:03 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-04-07  9:13 about:conf->recovery_disabled and mddev->recovery_disabled majianpeng
2012-04-09  0:03 ` NeilBrown [this message]
2012-04-10  5:37 ` majianpeng

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