EDIT:
This issue is now resolved. For detailed instruction how to remove full disk encryption, please see the "Can I disable full-disk encryption?" topic, there you can find a step by step instruction how to remove full-disk encryption.
https://askubuntu.com/questions/245112/can-i-disable-full-disk-encryption/412737#412737
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I am trying to remove whole drive encryption from my Ubuntu installation.
I've run Ubuntu from Live CD, mounted crypt partition and copied it to another partition /dev/sda3.
sudo cryptsetup luksOpen /dev/sda5 crypt1
sudo dd if=/dev/ubuntu-vg/root of=/dev/sda3 bs=1M
After that I've run boot-repair: https://help.ubuntu.com/community/Boot-Repair
Added entry to /etc/fstab:
UUID=<uuid> / ext4 errors=remount-ro 0 1
Of course I've replaced with blkid result of my /dev/sda3. I've also
deleted overlayfs and tmpfs lines from /etc/fstab. (I've just compared it to content of /etc/fstab in non-encrypted Ubuntu installation and could not find overlayfs and tmpfs).
I've chrooted from LiveCD into my system and rebuilt initramfs: http://blog.leenix.co.uk/2012/07/evmsactivate-is-not-available-on-boot.html
I've also removed cryptsetup using apt-get remove.
Basically I can easily mount my system partition from Live CD (without setting up the encryption and LVM stuff), but can not boot from it. Instead I see:
cryptsetup: evms_activate is not available
When I've chosen the Recovery mode I've seen this:
Begin: Mounting root file system ...
Begin: Running /script/local-top ...
Reading all physical volumes.
This may take a while ...
No volume groups found
cryptsetup: evms_activate is not available
Begin: Waiting for encrytpted source device ...
My /etc/crypttab is empty.
I am pretty sure that system tries to find encrypted partition, search for LVMs etc.
Do you have ideas what could be the problem or how can I fix it?
Thanks
Best Answer
I had the same problem and finally solved
The problem seems to be in update-initramfs that doesn't generate the initrd properly.
"evms_activate not found" means that the /sbin/evms_activate file is not created inside the initrd file by update-initramfs
So, my workaround consists in unpacking the not working initrd, and copy the evms_activate executable into /sbin/ from a working initrd file (probably getting one from a deb file of debian/ubuntu repositories), and packing initrd again.
In my case, I made the following steps.
We create two folders:
We copy the corrupted initrd to NOT_WORKING folder (in my case "initrd.img-3.4.94") and the working to WORKING (in my case "initrd.img-3.8.0-31-generic").
Unpack both initrd:
We copy evms_activate
And we pack initrd again
Now the evms_active error should dissappear :)