Home / ubuntu / Questions / 1054381
In Process
nadermx
Asked: 2018-07-12 17:32:44 +0800 CST

Resize ubuntu 16.04 KVM Hard drive

  • 772

I'm currently doing the following process on the Host

mv vm.qcow2 vm.qcow2.bak
qemu-img create -f qcow2 addon.qcow2 +100G
cat vm.qcow2.bak addon.qcow2 >> vm.qcow2

This works, but when I book up the VM it still shows the old hard drive size?

kvm qemu

1 Answers

  1. The sequence of commands you've used results in a new image file with the original, un-resized content, and some new content is appended but entirely inaccessible.

    In order to resize a QCOW2 disk image, you should use qemu-img resize instead. For example:

    qemu-img resize vm.qcow2 +100G

    There's no need to cat anything.

    Keep in mind that this only changes the size of the virtual disk; you still need to use partitioning and filesystem tools to resize the virtual disk partitions and the filesystems contained on the virtual disk.

    • 1