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LVM (Linux Volume Manager) is installed on the Free/Unallocated space

LVM allows for great flexibility when allocating Hard disk partitions. The reason partitions are used is because: of seperate xen host servers, and for providing for a more stable server: if /var/tmp is filled up - the server can still function, as other partitions are unaffected.

  • Check if there is partitions available.


  • If a partition is made via cfdisk - a reboot maybe required for udev to pick it up.
  • The commands listed below should be self-explainatory.

apt-get install lvm2 pvcreate /dev/sda3 pvcreate /dev/sdb2 vgcreate main-vol /dev/sda3 /dev/sdb2 vgscan

lvcreate -n zachome –size 50g main-vol lvcreate -n zachomeswp –size 1g main-vol

mkfs.ext3 /dev/main-vol/zachome mkswap /dev/main-vol/zachomeswp

resize2fs /dev/main-vol/zachome 40000 lvreduce -L-10g /dev/main-vol/zachome #subtract 10Gb from current size!



Increase the Size of an LVM Partition

//umount the partition or poweroff the domU server. //the commands below should be available on the dom0 or main server. lvextend -L+10G /dev/main-vol2/twister //extend the LinuxVolume. Add 10 gigabytes to the present size. e2fsck -f /dev/main-vol2/twister //Run a (forced) check on the filesystem resize2fs /dev/main-vol2/twister //resize the filesystem

Increase size of an LVM Swap Partition

swapoff -v /dev/VolGroup00/LogVol01 lvm lvresize /dev/VolGroup00/LogVol01 -L +256M mkswap /dev/VolGroup00/LogVol01 swapon /dev/VolGroup00/LogVol01

Shrink Size of a LVM Partition

e2fsck -f /dev/vg0/vm07-root resize2fs -p /dev/vg0/vm07-root 10G lvresize -L 11G /dev/vg0/vm07-root e2fsck -f /dev/vg0/vm07-root resize2fs -p /dev/vg0/vm07-root

Main One =

lvm_on_xen_dom0.txt · Last modified: 2022/07/19 21:13 by