Switch Back To Arch

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Since I Moved the city and changed the job, my laptop had to be returned to company, so I bought another HP 8460P which is almost the same as my old one. But this one got i7 4 core CPU and more powerful.
First I installed Ubuntu and start playing virtualization on it, after successfully installed OpenStack and OpenContrail I started to think change back to my archLinux, so following is the steps.

grub

Use update-grub2 in Install Ubuntu, it will automatically scan all of the disks, cause I installed the archLinux in the second harddisk, it will add a new item in menu.lst, use this item we could reached ArchLinux.

Libvirt

Enable the libvirtd.service via:

sudo systemctl enable libvirtd.service

Then restart the system.

Nested Virtualization

Manually we could do via:

# modprobe -r kvm_intel
# modprobe kvm_intel nested=1

Then check it via:

$ systool -m kvm_intel -v | grep nested
    nested              = "Y"

Add it to automatically loaded kernel module:

$ cat /etc/modprobe.d/modprobe.conf
options kvm_intel nested=1

Then next time it boots up, will enter the nested mode.

Didn’t solved, fuck!!!!!!!

Mount LVM Partitions

The steps is listed as following:

[Trusty@~]$ sudo vgscan
  Reading all physical volumes.  This may take a while...
  Found volume group "DashUbuntu-vg" using metadata type lvm2
[Trusty@~]$ sudo vgchange -ay DashUbuntu-vg
  2 logical volume(s) in volume group "DashUbuntu-vg" now active
[Trusty@~]$ sudo lvscan
  ACTIVE            '/dev/DashUbuntu-vg/root' [690.48 GiB] inherit
  ACTIVE            '/dev/DashUbuntu-vg/swap_1' [7.91 GiB] inherit
[Trusty@~]$ sudo mount /dev/DashUbuntu-vg/root /mnt
[Trusty@~]$ ls /mnt
bin   etc         initrd.img.old  lost+found  opt   run   sys  var
boot  home        lib             media       proc  sbin  tmp  vmlinuz
dev   initrd.img  lib64           mnt         root  srv   usr  vmlinuz.old