From mboxrd@z Thu Jan  1 00:00:00 1970
From: NeilBrown <neilb@suse.de>
Subject: Re: Wrong array size detected after reboot
Date: Thu, 20 Sep 2012 21:39:48 +1000
Message-ID: <20120920213948.7dfc5f78@notabene.brown>
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To: Markus Irle <tha.bear@gmail.com>
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On Thu, 20 Sep 2012 11:53:04 +0200 Markus Irle <tha.bear@gmail.com> wrote:

> Hi Neil,
>=20
> On Thu, Sep 20, 2012 at 1:11 AM, NeilBrown <neilb@suse.de> wrote:
> >
> > Yes, the metadata has lots the most-significant-bit of the 'size'.
> >
> > So it should be sufficient to:
> >   mdadm -G /dev/md2 --size 2930266432
> >
> > where the size is calculated as the current "used device size" plus 2^3=
1.
> > You could probably just do "--size max"
> >
> > This will cause a resync of the 2G of data which is probably unnecessar=
y, but
> > is awkward to avoid.
>=20
> Thanks, will try.
>=20
> Resyncing won't overwrite the existing data, will it?

No, it won't.  It'll just check all the parity blocks are correct.

> Sorry for being overly cautious...

Not something to apologise for ....

NeilBrown

>=20
> Cheers,
> Markus


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