Recommendations on cloning a bootable main disk
Jerry Feldman
gaf.linux at gmail.com
Sat Dec 1 13:21:09 EST 2018
Boot any Linux distro, Fedora or Ubuntu from USB, and dd should work fine.
Sent from Galaxy S9+
Jerry Feldman <gaf.linux at gmail.com>
Boston Linux and Unix
http://www.blu.org
PGP key id: 6F6BB6E7
PGP Key fingerprint: 0EDC 2FF5 53A6 8EED 84D1 3050 5715 B88D 6F6B B6E7
On Sat, Dec 1, 2018, 12:53 PM Bruce Labitt <bruce.labitt at myfairpoint.net
wrote:
> It' apparent that one uses a variant of dd. What isn't apparent is how
> one goes about cloning one's primary disk (active). From searching it
> appears it is not recommended to use dd when the disk is active, either
> the source or the destination.
>
> I'm trying to clone my nearly full SSD with the OS (Ubuntu 18.04) to a
> new larger SSD.
>
> Is there a tiny linux I can boot into that I can run dd from? Or can I
> make the main disk ro? What do you suggest?
>
> I have backed up home. I really don't want to re-install the OS, since
> I have had troubles with gdm3 screwing up (different topic). (Black
> screen, no consoles)
>
> Recommendations/recipes on the cloning process sought.
>
> I was simply going to use
>
> # dd if=/dev/sda of=/dev/sdc bs=4096 conv=sync,noerror
>
> I've seen lots of comments about block size and optimal setting, but I'm
> not sure what is optimal if there are unknown (but few) source drive
> errors.
>
> Thanks,
>
> Bruce
>
>
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