#Ubuntu volume manager free

The main advantage of LVM is how easy it is to resize a volume or volume group. Physical volumes do not have any direct counterpart, but I'll talk about that soon. The well-known alternative to GRUB, systemd-boot on the other hand reads only vfat filesystems, so that's not going to work either.Īlthough the list consists of three components, only two of them are direct counterparts to the partitioning system. That is because GRUB (the most common bootloader for Linux) can't read from logical volumes.

The /store directory has now been extended.One exception to the previous statement is that you can not use logical volumes for /boot. The filesystem on /dev/store/store is now 9278377984 (4k) blocks long. Logical volume store successfully resized.įilesystem at /dev/store/store is mounted on /store on-line resizing required Size of logical volume store/store changed from 30.92 TiB (8106231 extents) to 34.56 TiB (9060916 extents). sudo lvextend -l +100%FREE /dev/store/store To make it take effect immediately, we do lvextend and resize2fs. Volume group 'store' successfully extended Physical volume '/dev/sda3' successfully created (parted) set 3 lvm onĬreate Physical Volume and extend Volume Group Number Start End Size File system Name Flags Sector size (logical/physical): 512B/4096B Let’s print the information, we can see Number 3 is ‘logical’ now. So we make a logical volume using (parted) mkpart logical 38.0TB 42.0TB

#Ubuntu volume manager free

The free space starts from 38.0TB and ends at 42.0TB on the disk. Welcome to GNU Parted! Type 'help' to view a list of commands.

If you want to add a new disk, say /dev/sdd, just use it in the following commands. I use /dev/sda because the 4-TB space in on it. Turn on LVM on the free spaceĮxcute parted on the disk where new physical space is located. I found the 4-TB free space is under /dev/sda, whose number is 3.įirst use parted tool to first turn on LVM on this partition, then create physical volume (PV) /dev/sda3, and finally extend store with /dev/sda3. The names can be choosen arbitrarily, and I used these names during installation just for simplicity.ĭo sudo fdisk -l to list all disks. The first ‘home’ in ‘home-home’ stands for the Volume Group (VG) and the second for the Logical Volume (LV) of the VG. dev/mapper/store-store 30T 27T 2.9T 90% /storeĪnd the two LVM dirs /home and /store show differently ( /dev/mapper/home-home and /dev/mapper/store-store) from physical volume like /opt in the first ‘Filesystem’ column. Use df -h to check current status of file systems, and we’ll get output like: Filesystem Size Used Avail Use% Mounted on And when the /store dir is about to be full, I added the 4-TB free space to it. A physical space of 4 TB was not in use at first. I created 2 LVs when installing Ubuntu Server 16.04 LTS on a computer: /home which is users’ home directory and /store for data storage.

LV (logical volume): (virtual) volume created on VG.

VG (volume group): (virtual) group based on at least one PV.

PV (physical volume): actual disk or partions on it.

For people who want to overcome volume shortage in their workstations/servers, it is a economic and brilliant choice.

With LVM, however, we can combine different physical volumes together and always add new space to an exsiting LVM partition in principle. Traditionally, if we add a new hard drive to an exsiting Linux computer, we would assign a new mount point to the disk, and use some techniques to mount automatically at startup for convenience. The most attractive feature of LVM to me, is the capability to resize the disk volume dynamically. Since version 12.10, Ubuntu has introduced LVM support in the installation process. LVM (Logical Volume Manager) is a powerful tool for logical volume management on Linux systems. Be careful with your disk when reading this note and similar ones.