From: NeilBrown <neilb@suse.de>
To: Simon Matthews <simon.d.matthews@gmail.com>
Cc: LinuxRaid <linux-raid@vger.kernel.org>
Subject: Re: Can't start array and Negative "Used Dev Size"
Date: Wed, 29 Jun 2011 15:37:53 +1000 [thread overview]
Message-ID: <20110629153753.5279c034@notabene.brown> (raw)
In-Reply-To: <BANLkTimonHoSn5eoX9AB8wLJYR4SFoBd-w@mail.gmail.com>
On Tue, 28 Jun 2011 22:24:41 -0700 Simon Matthews
<simon.d.matthews@gmail.com> wrote:
> Neil,
>
>
>
> On Tue, Jun 28, 2011 at 10:18 PM, NeilBrown <neilb@suse.de> wrote:
> > mdadm -S /dev/md5
> > mdadm -C /dev/md5 --metadata 1.0 -l1 -n2 --assume-clean
>
> Will I lose data if I do this? Should I use metadata 1.2 ?
If you use 1.2 you will lose data. If you use 1.0 you will not.
With 0.90 and 1.0 the data starts at the start of each device. so 1.0 will
see the same data as 0.90 would.
With 1.2 there is some metadata first and the start starts later, so if you
use that the data will appear in the wrong place.
NeilBrown
>
> >
> > Then all should be happiness.
> >>
> >
> > mdadm -S /dev/md4
> > mdadm -A /dev/md4 /dev/sdc1 /dev/sdd1 --verbose
>
> That solved it. The array started.
>
> Thanks!
>
> Simon
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next prev parent reply other threads:[~2011-06-29 5:37 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-29 4:29 Can't start array and Negative "Used Dev Size" Simon Matthews
2011-06-29 5:18 ` NeilBrown
2011-06-29 5:24 ` Simon Matthews
2011-06-29 5:37 ` NeilBrown [this message]
2011-06-29 5:59 ` Simon Matthews
2011-06-29 6:18 ` NeilBrown
2011-06-29 15:45 ` Simon Matthews
2011-06-30 0:25 ` NeilBrown
2011-06-30 3:15 ` Simon Matthews
2011-07-02 4:41 ` Simon Matthews
2011-07-02 6:19 ` Simon Matthews
2011-07-04 5:45 ` Luca Berra
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