From: Stefan Roese <stefan.roese@gmail.com>
To: Roman Mamedov <rm@romanrm.ru>
Cc: Mikael Abrahamsson <swmike@swm.pp.se>, linux-raid@vger.kernel.org
Subject: Re: Convert RAID5 to RAID6 in a live system
Date: Wed, 23 Mar 2011 10:07:48 +0100 [thread overview]
Message-ID: <201103231007.48693.stefan.roese@gmail.com> (raw)
In-Reply-To: <20110323131424.70a0e08a@natsu>
On Wednesday 23 March 2011 09:14:24 Roman Mamedov 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).
Thanks. I already started with this conversion, so this "--layout=preserve" is
not an option for me any more. But good to know that this conversion should
work. But its slow - it'll take approx. 4 days with my 2TB drives.
Best regards,
Stefan
next prev parent reply other threads:[~2011-03-23 9:07 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
2011-03-23 9:07 ` Stefan Roese [this message]
2011-03-23 11:15 ` Mikael Abrahamsson
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