Re: Clone logical volume using dd

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On Mon, Nov 23, 2020 at 5:37 AM Samuel Sieb <samuel@xxxxxxxx> wrote:
I don't know where you got that command from, but "noerror" would
generally be used if the source device is failing.  And yes, in that
case, you might get a corrupted image.  

The command came from here:

https://www.cyberciti.biz/faq/unix-linux-dd-create-make-disk-image-commands/

So it's better to use just "sync" and not "noerror" right ?
 
The block size won't change the resulting image.  It's just that the
default block size of 512 bytes can be quite inefficient.  Using a
larger block reduces the CPU time used in system calls.


Ok so it makes no difference, and I will use whatever is most efficient on my hardware.
 
But as Jorge said, this is probably not the right tool for what you want
to do.

But again, I just want to copy the contents of the root logical volume, and not the partition itself.

The reason I am doing this is because I want to move to the newer thin LVMs. The partition will remain just the root logical volume will be deleted and then recreated as a thin logical volume.

Is partclone still the best option in the above scenario ? 

--
Regards,
Sreyan Chakravarty
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