Re: [PLUG] Recovering my laptop

Sounds plausible... I use encrypted LVM's all the time and haven't had any major problems. Even across some previously occurring random power black and brown outs before I re-engineered my power infrastructure. 'Not something you want "test" unless you are prepared (i.e. complete backups) but I can say I lived through it.

One thing I would recommend if possible is to keep your encrypted volumes on separate physical disks. When I do LVMs I never partition- e.g. use /dev/sdb instead of /dev/sdb1. Its a secondary visual prompt to prevent me from thinking that said disk(s) contain(s) standard partitions.

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Keith C. Perry, MS E.E.

Managing Member, DAO Technologies LLC

(O) +1.215.525.4165 x2033

(M) +1.215.432.5167

www.daotechnologies.com

From: "rosatoj" <rosatoj@gmail.com>
To: "Philadelphia Linux User's Group Discussion List" <plug@lists.phillylinux.org>
Sent: Wednesday, April 25, 2018 1:17:11 PM
Subject: Re: [PLUG] Recovering my laptop

No. System booted (sda1/2 were OK) but could not unlock because - corruption.

After some searching I arrived here. I must have overwritten the LUKS header by writing a bootloader over it. Which is possible. Luckily I have my data backed up elsewhere, just a bummer to rebuild. The only part that puzzles me is the /dev/sda3 disappearing. I might have messed up a header but then I would expect /dev/sda3 to be there.. with just confusing data. How would an overwrite corrupt the partition enough to come back as.. well, not a partition?!

To stop this badness in the future, here is a good short article on using your un-encrypted /boot to store both your LUKS header backup and LVM information.

Joe

On Wed, Apr 25, 2018 at 12:36 PM Keith C. Perry <kperry@daotechnologies.com> wrote:

Joe,

I'm not logged into Google right now so I can't see the image but before this, when you booted, did the LUKS partition automatically "unlock"?

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
Keith C. Perry, MS E.E.
Managing Member, DAO Technologies LLC
(O) +1.215.525.4165 x2033
(M) +1.215.432.5167
www.daotechnologies.com

From: "rosatoj" <rosatoj@gmail.com>
To: "Philadelphia Linux User's Group Discussion List" <plug@lists.phillylinux.org>
Sent: Wednesday, April 25, 2018 9:58:17 AM
Subject: [PLUG] Recovering my laptop

Uhg. Did an laptop install a little while back at work and decided to select both LVM and LUKS to secure the drive (one of there standard options). Did some updates yesterday and now can't boot. Get this..

Did some quick research and found this, and my setup IS sda1(EFI),2(boot),3(LUKS lvm) like they list - but using rescue disk now shows just first two. The sda3 is being listed as 'unallocated' in gparted.

I'm about to dive in - figured I'd send this if someone has a quick answer. Since I never used this formation before (I've used LVM, not LUKS) I'm assuming best to do this shout out for any known tricks/issues. It is 16.04 ubuntu.

Uhg. Morning blown.

Joe
--
Joe

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Philadelphia Linux Users Group -- http://www.phillylinux.org
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___________________________________________________________________________
Philadelphia Linux Users Group -- http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug

Joe

___________________________________________________________________________
Philadelphia Linux Users Group -- http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug