Debian jessie volume group not found and can't boot

Question

I have accidentally deleted my boot partition. OS is Debian Jessie with LUKS LVM. I have created a new partition and successfully reinstalled grub with the chroot method.

Now when I try to boot, my root partition cannot be found.

I get the following error message and then prompts to initramfs.

Gave up waiting for root device. Common problems:

Boot args (cat /proc/cmdline )

Check root delay = (did the system wait long enough)

Check root= (did the system wait for the right device?)

Missing modules (cat /proc/modules; ls /dev)

ALERT! /dev/mapper/vg--mypc-root does not exist.

Dropping to shell!

modprobe: module ehci-orion not found in modules.dep

I found this link. Maybe it is the same problem.

I have done the following things:

cryptsetup luksOpen /dev/sda5 mylvm

lvmscandisk

/dev/mapper/mylvm [ 178,33 GiB] LVM physical volume

/dev/sda1 [ 243,00 MiB]

/dev/sda5 [ 178,33 GiB]

vgchange -ay

2 logical volume(s) in volume group "mypc-vg" now active

lvscan

ACTIVE '/dev/mypc-vg/root' [178,33 GiB] inherit

ACTIVE '/dev/mypc-vg/swap_1' [9,08 GiB] inherit

mount /dev/mypc-vg/root /mnt

mount /dev/sda1 /mnt/boot

mount --bind /dev /mnt/dev
mount --bind /dev/pts /mnt/dev/pts
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys

chroot /mnt

aptitude reinstall grub2-common grub-pc-bin grub-gfxpayload-lists grub-common

aptitude reinstall linux-image-3.16.0-4-amd64

I also have reinstalled lvm2 in chroot environment without effect. update-grub and grub-install give no errors but during booting, but it still prompts to initramfs console.

Then I tried to copy all *.deb files from livecd to chroot'ed /tmp folder and run dpkg -i *deb to install all packages to the filesystem. This had also no effect. Was found here.

Now I don't know what to do next. I think I am going in the wrong direction.

Solution

Looks like volume group is called mypc-vg, but your kernel command line references vg-mypc. Fix that by editing the boot arguments in GRUB before booting. Then make the change permanent by reconfiguring GRUB from the running system.