From: Neil Brown <neilb@suse.de>
To: Brad Campbell <brad@wasp.net.au>
Cc: RAID Linux <linux-raid@vger.kernel.org>
Subject: Re: Basic RAID5/6 reshape question
Date: Tue, 16 Dec 2008 09:20:09 +1100 [thread overview]
Message-ID: <18758.55321.738370.893867@notabene.brown> (raw)
In-Reply-To: message from Brad Campbell on Thursday December 11
On Thursday December 11, brad@wasp.net.au wrote:
> G'day all,
>
> I'm just doing some system upgrades and shuffling some arrays around as part of the process.
> All my other current questions have been answered by experimentation, but one.
>
> I'm going to start with a RAID 6 comprised of 7 x 1TB drives, and reshaping to 10 x 1TB.
> I'm doing an experiment right now with re-shaping a RAID-5 of 2 drives into 3 drives which is taking
> about 20 hours, from that I'm assuming that a nice big re-shape will take a considerable amount of
> time. I have a reliable UPS, I'm more concerned about a drive or cable flaking out.
>
> What happens if I'm in the middle of a reshape of a RAID 5 or 6 and lose a drive?
The reshape continues creating a degraded array.
>
> Will the array be able to continue to reshape in a degraded state?
Yes.
The process is designed to survive losing a single drive, or a system
crash (but not both).
>
> Hoping of course that this does not occur, but just trying to plan ahead in case.
Sensible!
NeilBrown
prev parent reply other threads:[~2008-12-15 22:20 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-11 9:55 Basic RAID5/6 reshape question Brad Campbell
2008-12-12 1:06 ` Ryan Wagoner
2008-12-12 19:17 ` Brad Campbell
2008-12-12 20:27 ` Justin Piszcz
2008-12-12 3:52 ` Roger Heflin
2008-12-15 22:24 ` Neil Brown
2008-12-15 22:20 ` Neil Brown [this message]
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