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From: Marc MERLIN <marc@merlins.org>
To: Shriramana Sharma <samjnaa@gmail.com>
Cc: linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: Moving an entire subvol?
Date: Sat, 29 Nov 2014 20:21:23 -0800	[thread overview]
Message-ID: <20141130042123.GD8916@merlins.org> (raw)
In-Reply-To: <CAH-HCWVcu9FW0c3zwEg_KR_yaPGRQ58yHbXsUx1JCKRu4s7NXQ@mail.gmail.com>

On Sun, Nov 30, 2014 at 09:01:42AM +0530, Shriramana Sharma wrote:
> So the Ubuntu Wiki BtrFS entry advises against using subvol
> set-default because it boots its kernel using root=subvol=@ and home
> as subvol=@home, and these two subvols are only present under the
> subvol with ID 5. But isn't it just possible to move i.e. reparent a
> subvol so I can move these two under another subvol and have that as
> default?

Make a new subvolume called /root and just mount subvol=root
Note that you can't mount subvols recursively in one mount AFAIK.

This is what my system looks like:
LABEL=btrfs_pool1 /               btrfs    subvol=root,defaults,compress=lzo,discard,skip_balance,noatime 0       0
LABEL=btrfs_pool1 /usr            btrfs    subvol=usr,defaults,compress=lzo,discard,skip_balance,noatime  0       0
LABEL=btrfs_pool1 /var            btrfs    subvol=var,defaults,compress=lzo,discard,skip_balance,noatime  0       0
LABEL=btrfs_pool1 /home           btrfs    subvol=home,defaults,compress=lzo,discard,skip_balance,noatime 0       0
LABEL=btrfs_pool1 /tmp            btrfs    subvol=tmp,defaults,compress=lzo,discard,skip_balance,noatime,noexec  0       0
LABEL=btrfs_pool1 /mnt/btrfs_pool1 btrfs   defaults,compress=lzo,discard,skip_balance,noatime,subvolid=0         0       0

Hope this helps.

Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/                         | PGP 1024R/763BE901

  reply	other threads:[~2014-11-30  4:21 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-11-30  3:31 Moving an entire subvol? Shriramana Sharma
2014-11-30  4:21 ` Marc MERLIN [this message]
2014-11-30 10:27   ` Shriramana Sharma
2014-12-01  0:10     ` Marc MERLIN
2014-12-01  0:54 ` Chris Murphy
2014-12-02  3:21   ` Shriramana Sharma
2014-12-02  8:34     ` Hugo Mills
2014-12-03  2:32       ` Shriramana Sharma
2014-12-03  8:37         ` Hugo Mills
2014-12-02  8:50     ` Duncan
2014-12-02 13:28     ` David Sterba
2014-12-02 15:11       ` Shriramana Sharma
2014-12-02 20:30         ` Robert White
2014-12-02 21:13         ` Austin S Hemmelgarn
2014-12-03  2:33           ` Shriramana Sharma
2014-12-05 17:34         ` David Sterba

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