Ubuntu volume manager update#
Ubuntu volume manager free#

Don't worry, you won't loss your data under normal circumstances. I will use an emulated disk /dev/loop3 to demonstrate the whole process.

Ubuntu volume manager update#

Update the GPT / MBR partition table using fdisk.

dev/mapper/test-vg-test-lv ext4 464M 24K 429M 1% /home/tonny/mntĪlso you could check the LVM Volume Group status by vgs. df -Thįilesystem Type Size Used Avail Use% Mounted on Note that ubuntu-vg-ubuntu-lv is the root partition of the system here. nvme0n1p3 is the last GPT partition on the disk nvme0n1, and it is easy to identify this partition is a LVM PV, and ubuntu-vg-ubuntu-lv is the corresponding lsblk -fs You could verify this with the command lsblk -fs.

The following instructions in this section assume the last partition on your disk is the LVM Physical Volume.

I didn't test online resizing on the root partition so far. I suggest all the operations should be done under live CD environment to avoid the occurrence of unpredictable problems. Thus, we should modify not only the GPT / MBR partition table, but also the LVM configuration.

Logical Volume Manager (LVM) is similar to Dynamic Disks under Windows, which can take several GPT / MBR partitions on different hard disks as a storage pool (LVM call it Volume Groups, VG), and allocate spaces from this pool, then Linux will recognize each space (LVM call it Logical Volume, LV) as an useable partition. However, things get complex when Ubuntu utilizes LVM partition as their default root partition. In the past, we could easily resize the ext4 root partition with the help of resize2fs.

Ubuntu volume manager free#

'/dev/sda4' is a new physical volume of '20.When we resize the virtual hard disk of a virtual machine or restore a disk image to a larger disk, the free space of the partition detected by Ubuntu will not increase because the partition table is unchanged. PV UUID f3tYaB-YCoK-ZeRq-LfDX-spqd-ggeV-gdsemo Let's take a look at our physical volumes: $ pvdisplay Physical volume '/dev/sda4' successfully created First we'll create the physical volume: $ pvcreate /dev/sda4 So now let's pull it into our LVM configuration. Partition 1 does not end on cylinder boundary. I/O size (minimum/optimal): 512 bytes / 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes When your system comes back up, check on your new partition: $ fdisk -l /dev/sdaĭisk /dev/sda: 42.5 GB, 21474836480 bytesĢ55 heads, 63 sectors/track, 2610 cylinders

Select the Write command to create the partition, then (if necessary) reboot your system. Remember in x86 Linux that you can have a maximum of 4 primary + extended partitions per disk.īeyond that, you'll need to begin adding logical partitions in your extended partitions. For a small server, it probably doesn't matter too much. Pick your free space, select New, then choose a Primary or Logical partition. You can see your free space, so let's partition it: $ cfdisk Number Start End Size Type File system Flags Sector size (logical/physical): 512B/512B

Welcome to GNU Parted! Type 'help' to view a list of commands. Then we'll run the GNU partition editor to examine our disk: parted (This example uses Ubuntu Server 12.04, but it works for 14.04, 16.04 and 18.04 as well.)Īfter you make the additional space available in VMWare/Xen/Hyper-V, first reboot your Ubuntu server so it can see the new free space. There are quite a few ways to do this, and fortunately you're running the Logical Volume Manager (link is external) (LVM) in Ubuntu, so the process isn't too bad. So you're running an Ubuntu server in a virtual machine, and now you need to add 20 GB of disk space to root (/).