[gentoo-user] Re: How to move ext4 partition

[Grant Edwards <grant.b.edwards@gmail.com>]

On 2023-09-20, Frank Steinmetzger <Warp_7@gmx.de> wrote:
> Am Wed, Sep 20, 2023 at 10:57:00PM +0100 schrieb Victor Ivanov:
>
>> On Wed, 20 Sept 2023 at 22:29, Grant Edwards <grant.b.edwards@gmail.com> wrote:
>> >
>> > That depends on how long it takes me to decide on tar vs. rsync and
>> > what the appropriate options are.
>> 
>> I've done this a number of times for various reasons over the last 1-2
>> years, most recently a few months ago due to hard drive swap, and I
>> find tar works just fine:
>> 
>> $ tar -cpf /path/to/backup.tar --xattrs --xattrs-include='*.*' -C / .
>
> Does that stop at file system boundaries (because you tar up '/')? I think 
> it must be, otherwise you wouldn’t use it that way.
> But when copying a root file system, out of habit I first bind-mount it in a 
> subdirectory and tar/rsync from there instead. This will also make files 
> visible which might be hidden under an active mount.

The partition/fs being backed up isn't live (it's mounted, but it's
not the root partition of the host doing the backup), so nothing is
mounted within it and there aren't any /proc or /sys entries in
it. So, in this case there's no need to worry about crossing
filesystem boundaries.

--
Grant