From mboxrd@z Thu Jan  1 00:00:00 1970
From: NeilBrown <neilb@suse.de>
Subject: Re: resizing array devices not working?
Date: Tue, 26 Jun 2012 11:31:29 +1000
Message-ID: <20120626113129.09275333@notabene.brown>
References: <4FE33B89.40007@ubuntu.com>
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To: Phillip Susi <psusi@ubuntu.com>
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On Thu, 21 Jun 2012 11:19:37 -0400 Phillip Susi <psusi@ubuntu.com> wrote:

> I was trying to do a little experiment with resizing devices.  I created=
=20
> two 1g logical volumes and built a raid1 array out of them, then=20
> lvresized the volumes to 2g, then ran:
>=20
> mdadm -G -z max /dev/md1
>=20
> That SHOULD expand the array to use the extra space right?  It keeps=20
> telling me that it set the size to just 1g.

Maybe you need a newer mdadm - 3.2.2 or newer might be required.  but you
didn't say which version you were using, or which kernel.

Or maybe you have 0.90 metadata and a kernel earlier than 3.1 that imposed
some limits, but I think that allows up-to 2GB, not upto 1, so that can't be
the problem.

Maybe you can just
 for i in /sys/block/md1/md/dev-*
 do echo 0 > $i/size
 done

and try again. '0' means 'max' in this context.

NeilBrown

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