From: NeilBrown <neilb@suse.de>
To: Roman Mamedov <rm@romanrm.ru>
Cc: linux-raid@vger.kernel.org
Subject: Re: Reshape RAID5 to a RAID6 with more (smaller) devices
Date: Wed, 12 Jan 2011 18:54:35 +1100 [thread overview]
Message-ID: <20110112185435.79c19036@notabene.brown> (raw)
In-Reply-To: <20110112122930.6a17440f@natsu>
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On Wed, 12 Jan 2011 12:29:30 +0500 Roman Mamedov <rm@romanrm.ru> wrote:
> Hello!
>
> I am considering to move my configuration in which I currently use two RAID5
> arrays (3*2TB and 3*1TB) to one described in [1]. Specifically, make a 6*1TB
> RAID6 plus 3*1TB RAID5 consisting of 2TB drives' "tails".
>
> My question is: does mdadm support a simultaneous reshape, changing at once:
> 1) RAID5 to RAID6
> 2) number of devices from 3 to 6
> 3) individual device size from 2TB to 1TB
>
> Note that the user-accessible space after this reshape does not change, and
> remains at 4 TB. So is that supported? Will that require a backup file? Will
> that proceed particularly inefficiently/slowly?
>
> [1] http://www.linuxconfig.org/prouhd-raid-for-the-end-user
>
Sorry, but no.
It could be implemented, probably without a lot of difficulty, but it hasn't
been.
NeilBrown
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prev parent reply other threads:[~2011-01-12 7:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-12 7:29 Reshape RAID5 to a RAID6 with more (smaller) devices Roman Mamedov
2011-01-12 7:54 ` NeilBrown [this message]
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