From: Roman Mamedov <rm@romanrm.net>
To: "Szalma László" <dblaci@dblaci.hu>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: BTRFS over LVM remounts read-only
Date: Sun, 12 Jan 2014 01:16:08 +0600 [thread overview]
Message-ID: <20140112011608.220a2ae3@natsu> (raw)
In-Reply-To: <52D19217.3060106@dblaci.hu>
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On Sat, 11 Jan 2014 19:48:55 +0100
Szalma László <dblaci@dblaci.hu> wrote:
> 2014-01-11 18:10 keltezéssel, MegaBrutal írta:
> > How can I shrink the FS to the correct size right now, ensuring that I
> > really shrink it to the exact LV size?
>
> btrfs fi re 10G /dev/mapper/vg-lv
> lvresize -L 10G vg/lv
That's setting yourself up for a failure if these tools happen to disagree on
what "G" means (GB vs GiB). Maybe that's what happened here with the thread
starter's FS?
To be completely safe, I would recommend to resize the FS in two steps, leaving
some safety margin to the partition resize first:
btrfs fi re 8G /dev/mapper/vg-lv
lvresize -L 10G vg/lv
btrfs fi re max /dev/mapper/vg-lv
--
With respect,
Roman
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next prev parent reply other threads:[~2014-01-11 19:16 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-11 14:32 BTRFS over LVM remounts read-only MegaBrutal
2014-01-11 15:04 ` Hugo Mills
2014-01-11 17:10 ` MegaBrutal
2014-01-11 17:28 ` Hugo Mills
2014-01-11 18:03 ` Chris Murphy
2014-01-11 18:48 ` Szalma László
2014-01-11 19:16 ` Roman Mamedov [this message]
2014-01-11 19:24 ` Szalma László
2014-01-11 23:08 ` Chris Murphy
2014-01-11 23:03 ` Chris Murphy
2014-01-12 4:44 ` Duncan
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