From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: Copying whole /gnu/store from USB does not work
Date: Fri, 10 Apr 2015 13:48:34 +0200
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References: <20150410084651.GA23353@thebird.nl>
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In-Reply-To: <20150410084651.GA23353@thebird.nl> (Pjotr Prins's message of
	"Fri, 10 Apr 2015 10:46:52 +0200")
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To: Pjotr Prins <pjotr.public12@thebird.nl>
Cc: guix-devel@gnu.org

Hi!

Pjotr Prins <pjotr.public12@thebird.nl> skribis:

> I thought I would be able to bootstrap using a USB image and copy
> /gnu/store to a local hard disk.

To =E2=80=9Cbootstrap,=E2=80=9D it=E2=80=99s best to install Guix on top of=
 your distro, and
build/download packages from there.  (Actually bootstrapping doesn=E2=80=99t
require any special action with Guix.)

> mount it with kpartx
>
>     kpartx -v -a gnu-usb-install-0.8.x86_64-linux
>     mkdir mnt=20
>     mkdir tmp
>     mount /dev/mapper/loop0p1 mnt
>     cp -vau mnt/gnu tmp
>     mv tmp/gnu/ /

That cannot work.

The reason is that the store is really two things: /gnu/store, and
/var/guix/db/db.sqlite.  The latter contains meta-data about the former,
notably the list of valid store items.

The valid way to do that is with =E2=80=98guix archive=E2=80=99 (info "(gui=
x) Invoking
guix archive"), or using the =E2=80=98populate-store=E2=80=99 and =E2=80=98=
register-closure=E2=80=99 as
is done in (gnu build vm).

HTH,
Ludo=E2=80=99.

PS: note that the latest version is 0.8.1, not 0.8.