From: Hugo Mills <hugo@carfax.org.uk>
To: George Shuklin <george.shuklin@gmail.com>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: Replacing or merging last snapshot
Date: Sat, 22 Aug 2020 13:18:57 +0100 [thread overview]
Message-ID: <20200822121857.GA1093@savella.carfax.org.uk> (raw)
In-Reply-To: <878539b1-b8eb-f547-fb4a-9026f1d51cf7@gmail.com>
On Sat, Aug 22, 2020 at 02:48:18PM +0300, George Shuklin wrote:
> I wonder if there is a way to free space if there is only one snapshot
> available. The problem is that there is a hidden top-level (id=5) subvolume,
> and there was ever switch from top-level to another subvolume as 'default'.
> If top-level subvolume have some data (not present in 'default' snapshot),
> this space is wasted.
>
> Are there way to 'merge' snapshot into top-level subvolume, or a way to
> completely remove subvolume 5 (without breaking fs)?
You can't remove the top-level subvolume (id 5). All you can do is
mount it (with -o subvolid=5 or =0) and (carefully) delete the parts
that you don't need. Remember that all the other subvolumes are
visible in this view, so don't just rm -rf *, because you'll delete
everything in the FS including your currently active subvols.
Hugo.
--
Hugo Mills | emacs: Emacs Makes A Computer Slow.
hugo@... carfax.org.uk |
http://carfax.org.uk/ |
PGP: E2AB1DE4 |
prev parent reply other threads:[~2020-08-22 12:19 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-22 11:48 Replacing or merging last snapshot George Shuklin
2020-08-22 12:18 ` Hugo Mills [this message]
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