On Mon, Aug 28, 2017 at 09:02:40PM +0100, Unman wrote:
> On Sat, Aug 26, 2017 at 01:36:41AM -0700, [email protected] wrote:
> > I wanted to transfer all my data from encrypted HDD(Debian 9) to Qubes OS
> > 
> > 1.  I attach HDD and run these commands:
> > 
> >     udisksctl unlock -b /dev/xvdi5   
> > 
> >     modprobe dm-mod 
> > 
> >     vgscan
> > 
> >     vgchange -ay debian-vg
> > 
> > 
> > 2.  After I copied a couple of file i run this:
> > 
> >     lvchange -an debian-vg
> > 
> >     vgremove debian-vg
> > 
> > Now after reboot and run from this disk i have this error:
> > 
> > Begin: Runing /scripts/local-block ...
> > Volume group "debian-vg" not found 
> > Skipping volume group debian-vg
> > Unable to find LVM volume debian-vg/root
> > 
> > In (AppVM) /etc/lvm is only one file (lvm.conf)
> > 
> > Maybe somewhere in the logs left data about LVM volume or volume group?
> > Maybe is possible to mount and restore data?
> > 
> 
> I'd hope that you have a full backup of the data.
> In general I recommend using vgexport instead of vgremove because that
> is a destructive operation, (as you've discovered.)
> 
> If possible I would take a full disk clone before doing anything else.
> Then you could try to recover the metadata -
> without knowing a good deal more about how your disk was organised it's
> difficult to be precise. But if you had sda1 as the LVM partition, you
> could try poking at the first part of that partition to see if you can
> get the data from your volumegroup(VG)
> 'dd if=/dev/sda1 of=debian-vg bs=512 count=255 skip=1'
> Then open the debian-vg file and look for the configuration data -
> delete the extraneous material but make sure that you keep the right
> format.(You'll need to use a decent editor that copes with binary data,
> like vi)
> 
> Then see if you can restore from the recovered file:
> 'vgcfgrestore debian-vg'
> 
> unman
> 

If you did a standard Qubes install and encrypted the disk, you will, of
course, have to decrypt the partition before trying this, and make sure
that you dd from the decrypted partition.

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