Anh Trinh JavaScript Developer

Using Lvm To Move Ubuntu To New Ssd

Moving old LVM Partition to the new SSD

After you have installed the SSD, in my case, it is located at /dev/nvme0n1, and let say your current Ubuntu is installed at /dev/sdOLD

# Make it a LVM Physical volume
sudo pvcreate /dev/nvme0n1

# Verify it
sudo lvmdiskscan

# My result:
#  /dev/nvme0n1          [     232.89 GiB] LVM physical volume#
#  /dev/ubuntu-vg/root   [      123.31 GiB]
#  .....
#  /dev/sdOLD   [      123.31 GiB] LVM physical volume#
# 

# Add the new LVM volume to existing ubuntu-vg LVM group
sudo vgextend ubuntu-vg /dev/nvme0n1

# Moving the old partion to the new 
sudo pvmove /dev/sdOLD

# Removing the old volume from ubunut-vg group 
sudo vgreduce ubuntu-vg /dev/sdOLD

# Remove the physical logical volume (if you wish)
sudo pvremove /dev/sdOLD

# Updating grub
sudo update-grub
sudo grub-install /dev/nvme0n1

Moving your home folder to new SSD

# create new logical volume on the remaining space
sudo lvcreate -l 100%FREE -n home ubuntu-vg

# make file system
sudo mkfs -t ext4 /dev/ubuntu-vg/home

# mount
sudo mount /dev/ubuntu-vg/home /mnt/home

# RSync the home folder
sudo rsync -aXS --info=progress2 /home/. /mnt/home/.

# Backup the current /home
cd /
sudo mv /home /home_backup

# Mount /home to the new location
sudo mkdir /home

# Change fstab
sudo vim /etc/fstab

# Add following line:
UUID=<your_partition_uui>   /home   ext4    nodev,nosuid  0 2

# ( To get the UUID you can use: $ sudo blkid )

# Logout and login again to check if it works
# If everything is find, delete the backup folder
sudo rm -rf /home_backup

# You might shrink your root partition
sudo lvresize -L 20G --resizefs /dev/ubuntu-vg/root

# To extend /home to take up all the free space
sudo lvresize -l +100%FREE --resizefs /dev/ubuntu-vg/home

References

  • Good introduction about LVM: https://www.digitalocean.com/community/tutorials/how-to-use-lvm-to-manage-storage-devices-on-ubuntu-16-04

  • The original idea is taken from the answer in this thread: https://askubuntu.com/questions/161279/how-do-i-move-my-lvm-250-gb-root-partition-to-a-new-120gb-hard-disk