Re: How to enlarge LUKS partition ?
On Tue, 21 Aug 2012 12:56:52 +0200
"tv.debian@googlemail.com" <tv.debian@googlemail.com> wrote:
> On 21/08/2012 11:46, J. B wrote:
> > On Tue, 21 Aug 2012 00:25:38 +0200
> > "tv.debian@googlemail.com"<tv.debian@googlemail.com> wrote:
> >
> >> On 20/08/2012 19:14, J. B wrote:
> >>> On Mon, 20 Aug 2012 17:57:31 +0200
> >>> "tv.debian@googlemail.com"<tv.debian@googlemail.com> wrote:
> >>>
> >>>> On 20/08/2012 16:53, J. B wrote:
> >>>>>
> >>>>> Dear list,
> >>>>>
> >>>>> Is there anyone who is successful increasing LUKS partition ?
> >>>>> I have 2 physical partitions /dev/sda1 and /dev/sda2.
> >>>>> There is 800 GB free disk space (un-partitioned) between sda1& sda2
> >>>>> Whole /dev/sda2 is dedicated to a LUKS partition which holds a LVM.
> >>>>> I have tried with gparted to increase /dev/sda2 but there is no support to increase luks.
> >>>>> How can I increase sda2, so that I can later execute cryptsetup resize ?
> >>>>>
> >>>>> Thanks
> >>>>>
> >>>>>
> >>>> Hi, I resized LUKS containers on several occasions, without lvm on top
> >>>> but it shouldn't be much more difficult.
> >>>> I usually operate from a live-cd, any will do as long as there is
> >>>> cryptsetup/lvm/whatever-filesystem-you-use support, or that you can
> >>>> install it.
> >>>> Close LUKS container if open (unmount partition, close lvm first if
> >>>> needed), fire up fdisk to destroy the partition that support the LUKS
> >>>> container, and recreate it with the desired size. fdisk commands are "d"
> >>>> (destroy),
> >>>
> [...cut...]
> >> The only difference with my system is that free space comes before the
> >> LUKS container in your case, I never had this scenario (free space
> >> always after LUKS).
> >>
> >
> > and that difference makes me nervous. I have gone through some more online tutorial,
> >
> > http://www.tuxevara.de/2010/03/resizing-a-luks-encrypted-root-filesystem-on-lvm/
> > http://www.hermann-uwe.de/blog/resizing-a-dm-crypt-lvm-ext3-partition
> >
> > where it is suggested to create the new partition starting from that *exact block* as the deleted one.
> > And my free space is before the partition not after.... so confused.... :-(
> >
>
> You could go a safer way by creating a new LUKS + lvm on your free
> space, migrate your system/data, adjust system to the new UUIDs/lvm
> names, and then destroy sda2 and grow the new container. It will take
> longer and you'll need to tinker a bit with your system configuration to
> adjust it to the new partition/LUKS container/lvm.
>
> (If) I have some spare time later today I'll test your use-case (free
> space before LUKS) and report here, I am curious too.
>
>
The free space is 10 GB, where the luks partition is 200 GB.
I'm eagerly waiting to know the output of your experiment.
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