From: Roman Mamedov <rm@romanrm.ru>
To: Mikael Abrahamsson <swmike@swm.pp.se>
Cc: Stefan Roese <stefan.roese@gmail.com>, linux-raid@vger.kernel.org
Subject: Re: Convert RAID5 to RAID6 in a live system
Date: Wed, 23 Mar 2011 13:14:24 +0500 [thread overview]
Message-ID: <20110323131424.70a0e08a@natsu> (raw)
In-Reply-To: <alpine.DEB.2.00.1103230905480.4842@uplift.swm.pp.se>
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On Wed, 23 Mar 2011 09:07:56 +0100 (CET)
Mikael Abrahamsson <swmike@swm.pp.se> wrote:
> On Wed, 23 Mar 2011, Stefan Roese wrote:
>
> > I'm currently in the process of converting a 3 disk RAID5 array into a 4
> > disk RAID5 array. I'm using mdadm 3.1.4 and Linux kernel 2.6.35-28-generic
> > (Ubuntu). My questions now is this conversion save in a live (running)
> > system? Or is this now allowed/supported?
>
> I guess you wanted to say "4 disk RAID6 array"?
>
> In that case, yes, I have done it on 2.6.32 and mdadm version (something
> older) and it went just fine.
>
> Neil wrote about it here <http://neil.brown.name/blog/20090817000931>.
Additionally, I suggest that you also check "man mdadm" and note the
"--layout=preserve" option, if you use it, the RAID5 to RAID6 conversion while
adding one disk will happen instantly, without restriping (but only with a
resync of the new drive).
--
With respect,
Roman
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next prev parent reply other threads:[~2011-03-23 8:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-23 7:43 Convert RAID5 to RAID6 in a live system Stefan Roese
2011-03-23 8:07 ` Mikael Abrahamsson
2011-03-23 8:14 ` Roman Mamedov [this message]
2011-03-23 9:07 ` Stefan Roese
2011-03-23 11:15 ` Mikael Abrahamsson
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