From: Wols Lists <antlists@youngman.org.uk>
To: Phil Turmel <philip@turmel.org>, linux-raid <linux-raid@vger.kernel.org>
Subject: Re: linux raid wiki - backup files
Date: Sun, 20 Nov 2016 14:48:25 +0000 [thread overview]
Message-ID: <5831B7B9.8090008@youngman.org.uk> (raw)
In-Reply-To: <ffb47575-b655-924d-8626-07b9e48a6371@turmel.org>
On 20/11/16 00:27, Phil Turmel wrote:
> Yes. But the new stripes lay on top of the old stripes, unless you move
> the data offset. Which is why a backup file holds the old stripe just
> in case. If you can move the offset, you use the lower offset for the
> lower addresses in the array, and the higher offset for the higher
> addresses, on either side of the reshape position.
Okay, understood. So v0.9 and v1.0 always need a backup for a reshape.
But if we have a data offset with v1.2, a reshape will use that space if
it can rather than needing a backup file?
(And changing topic slightly, that space is also used for an internal
bitmap?)
Cheers,
Wol
next prev parent reply other threads:[~2016-11-20 14:48 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-19 16:03 linux raid wiki - backup files Wols Lists
2016-11-20 0:27 ` Phil Turmel
2016-11-20 14:48 ` Wols Lists [this message]
2016-11-21 14:07 ` Phil Turmel
2016-11-21 20:22 ` Anthony Youngman
2016-11-21 21:02 ` Phil Turmel
2016-11-21 21:30 ` Anthony Youngman
2016-11-21 21:40 ` Phil Turmel
2016-11-21 22:45 ` NeilBrown
2016-11-22 23:16 ` Anthony Youngman
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