Groups > linux.debian.user > #262085

Fwd: btrfs snapshots (of root file system)?

Path	csiph.com!weretis.net!feeder6.news.weretis.net!feeder8.news.weretis.net!fu-berlin.de!bofh.it!news.nic.it!robomod
From	Keith Bainbridge <keithrbau@gmail.com>
Newsgroups	linux.debian.user
Subject	Fwd: btrfs snapshots (of root file system)?
Date	Mon, 02 Oct 2023 11:40:01 +0200
Message-ID	<Hknzb-d0qi-9@gated-at.bofh.it> (permalink)
References	<HjSF3-cGEx-3@gated-at.bofh.it> <Hknzb-d0qi-1@gated-at.bofh.it>
X-Mailbox-Line	From debian-user-request@lists.debian.org Mon Oct 2 09:33:33 2023
Old-Return-Path	<keithrbau@gmail.com>
X-Amavis-Spam-Status	No, score=-4.099 tagged_above=-10000 required=5.3 tests=[BAYES_00=-2, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FOURLA=0.1, FREEMAIL_FROM=0.001, GMAIL=1, HTML_MESSAGE=2, LDO_WHITELIST=-5, RCVD_IN_DNSWL_NONE=-0.0001] autolearn=no autolearn_force=no
X-Policyd-Weight	NOT_IN_SBL_XBL_SPAMHAUS=-1.5 CL_IP_EQ_HELO_IP=-2 (check from: .gmail. - helo: .mail-yb1-xb35.google. - helo-domain: .google.) FROM/MX_MATCHES_HELO(DOMAIN)=-2; rate: -5.5
X-Gm-Message-State	AOJu0YzBRMDGD0S3bwhReKfGMZ20qjdTqJAhUJZ9KIO48UDVOLIYQour 0sc/n898AvbXTIRC+sQyQMuR/I3kDLQqjz6uXczz05CcCcE=
X-Google-SMTP-Source	AGHT+IGeFQ/0uEqFHhpVLJZvfpsmWfppXKsRpfM1XKST5wF7cIGUlKeFTdbaZvnrUMwoAc0w1VfDIhe1GmlRsur95bw=
X-Received	by 2002:a25:4ec5:0:b0:d2c:32cb:c631 with SMTP id c188-20020a254ec5000000b00d2c32cbc631mr9325760ybb.27.1696239190652; Mon, 02 Oct 2023 02:33:10 -0700 (PDT)
MIME-Version	1.0
Reply-To	keithrbau@gmail.com
Content-Type	multipart/alternative; boundary="00000000000069be130606b8765b"
X-Mailing-List	<debian-user@lists.debian.org> archive/latest/803754
List-ID	<debian-user.lists.debian.org>
List-URL	<https://lists.debian.org/debian-user/>
List-Archive	https://lists.debian.org/msgid-search/CANLvssO=Zqsao5AtQC39asj2d1s+Cx5+1t-UAGBxQqxjC+G_NQ@mail.gmail.com
Approved	robomod@news.nic.it
Lines	114
Organization	linux.* mail to news gateway
Sender	robomod@news.nic.it
X-Original-Date	Mon, 2 Oct 2023 20:32:59 +1100
X-Original-Message-ID	<CANLvssO=Zqsao5AtQC39asj2d1s+Cx5+1t-UAGBxQqxjC+G_NQ@mail.gmail.com>
X-Original-References	<8eae6f3c0ec0060c6456f53e11ceeed8a9258ed5.camel@adminart.net> <CANLvssNEwxXG5J+f2QefT_jcy=u9SftpVm67DFBN+kucGzURVg@mail.gmail.com>
Xref	csiph.com linux.debian.user:262085

Show key headers only | View raw

[Multipart message — attachments visible in raw view] - view raw

Try ext4

All the best

Keith BAINBRIDGE

+61 (0)447 667 468
keithrbau@gmail.com

UTC + 10

>From my Apad

---------- Forwarded message ---------
From: Keith Bainbridge <keithrbau@gmail.com>
Date: Mon, 2 Oct 2023, 20:32
Subject: Re: btrfs snapshots (of root file system)?
To: debian-user@lists.debian.org <debian-user@lists.debian.org>


I use timeshift for this. It claims to use btrfs as an option. I've only
used rsync on extra, and that has saved my bacon a few times

All the best

Keith BAINBRIDGE

+61 (0)447 667 468
keithrbau@gmail.com

UTC + 10

>From my Apad

On Sun, 1 Oct 2023, 15:10 hw, <hw@adminart.net> wrote:

> Hi,
>
> with btrfs, how do I make a snapshot of the root file system?  The
> purpose is to update software and being able to go back to a previous
> state if necessary.
>
> There doesn't seem to be a command to create snapshots but only
> subvolumes?  How does a subvolume turn into a snapshot?  (The root
> file system is, of course, not on a subvolume.)
>
> How do I merge snapshots?  IIRC, when you remove a ZFS snapshot, the
> older state is merged to the state the snapshot is in.  Apparently
> btrfs can only delete snapshots --- and it seems like a bad idea to
> delete the root file system.  How would I boot from it when it's been
> deleted?
>
> Can I make a snapshot on a different volume?  The manpage doesn't say
> that the destination of a subvolume must be on the same volume, and in
> any case, I should be able to do that.
>
>

Thread

btrfs snapshots (of root file system)? hw <hw@adminart.net> - 2023-10-01 02:40 +0200
  Re: btrfs snapshots (of root file system)? debian-user@howorth.org.uk - 2023-10-01 12:00 +0200
    Re: btrfs snapshots (of root file system)? hw <hw@adminart.net> - 2023-10-01 21:30 +0200
  Fwd: btrfs snapshots (of root file system)? Keith Bainbridge <keithrbau@gmail.com> - 2023-10-02 11:40 +0200
  Re: btrfs snapshots (of root file system)? Keith Bainbridge <keithrbau@gmail.com> - 2023-10-02 11:40 +0200
  Re: btrfs snapshots (of root file system)? Anders Andersson <pipatron@gmail.com> - 2023-10-02 21:40 +0200
    Re: btrfs snapshots (of root file system)? hw <hw@adminart.net> - 2023-10-04 21:40 +0200

csiph-web