From: NeilBrown <neilb@suse.de>
To: Boyan Alexiev <alexiev@resonance.bg>
Cc: linux-raid@vger.kernel.org
Subject: Re: Backup file size when migrating from raid5 to raid6?
Date: Thu, 18 Jul 2013 06:51:59 +1000 [thread overview]
Message-ID: <20130718065159.0a40207e@notabene.brown> (raw)
In-Reply-To: <loom.20130717T145156-76@post.gmane.org>
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On Wed, 17 Jul 2013 13:01:15 +0000 (UTC) Boyan Alexiev <alexiev@resonance.bg>
wrote:
> If You have array with 9 devices and add another one You may at same time
> grow array and change raid level. In this case You not need backup file.
> Please try this:
> mdadm --grow /dev/md0 --raid-devices=10 --level=6
>
You can only skip the backup file if you are increasing the number of *data*
devices. I don't think your example does that.
(However with mdadm-3.3 this problem goes away if you have a new enough
kernel).
NeilBrown
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prev parent reply other threads:[~2013-07-17 20:51 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAH-e9vLTY2eo0p3ud5FaWNe_2f8hej0aitFuu8K0M1RZdObiXQ@mail.gmail.com>
2012-05-06 10:17 ` Backup file size when migrating from raid5 to raid6? Garðar Arnarsson
2012-05-06 11:00 ` NeilBrown
[not found] ` <CAH-e9vJkrv2R-HTR7JfHwZK1sbYQ3fduGbtxEwtor4gtyd6PKQ@mail.gmail.com>
2012-05-07 0:35 ` Garðar Arnarsson
2012-05-07 0:54 ` NeilBrown
2012-08-16 23:28 ` Thomas Fjellstrom
2012-08-17 0:39 ` NeilBrown
2012-08-17 0:45 ` Thomas Fjellstrom
2012-08-17 0:52 ` John Robinson
2013-07-17 13:01 ` Boyan Alexiev
2013-07-17 20:51 ` NeilBrown [this message]
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