Recommendations on cloning a bootable main disk

Tom Buskey tom at buskey.name
Sat Dec 1 15:18:28 EST 2018


Clonezilla is awesome for that.

On Sat, Dec 1, 2018 at 2:07 PM Dan Jenkins <dan at rastech.com> wrote:

> We use Clonezilla off a bootable USB flash drive.
>
> On December 1, 2018 12:51:34 PM EST, 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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