From mboxrd@z Thu Jan  1 00:00:00 1970
From: NeilBrown <neilb@suse.de>
Subject: Re: RAID-10 explicitly defined drive pairs?
Date: Thu, 22 Mar 2012 21:31:14 +1100
Message-ID: <20120322213114.61fd4e44@notabene.brown>
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To: Alexander Lyakas <alex.bolshoy@gmail.com>
Cc: Jan Kasprzak <kas@fi.muni.cz>, linux-raid <linux-raid@vger.kernel.org>, John Robinson <john.robinson@anonymous.org.uk>
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On Thu, 22 Mar 2012 12:01:48 +0200 Alexander Lyakas <alex.bolshoy@gmail.com>
wrote:

> Neil,
>=20
> > =A0echo frozen > /sys/block/mdN/md/sync_action
> > =A0mdadm --add /dev/mdN /dev......
> > =A0echo recover > /sys/block/mdN/md/sync_action
> >
> > it should do them all at once.
> >
> > I should teach mdadm about this..
>=20
> What is required to do that from mdadm? I don't see any other place
> where MD_RECOVERY_FROZEN is set, except via sysfs. So do you suggest
> that mdadm use sysfs for that?

Yes.

http://neil.brown.name/git?p=3Dmdadm;a=3Dcommitdiff;h=3D9f58469128c99c0d7f4=
34d28657f86789334f253

> Also, what should be done if mdadm succeeds to "freeze" the array, but
> fails to "unfreeze" it for some reason?

What could possibly cause that?
I guess if someone kills mdadm while it was running..


NeilBrown

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