Use fdisk or cfdisk, or whatever you feel comfortable with - you should see a whole bunch of unallocated space on your guest disk now.ģ) Finally, if you resized your existing partition, make the filesystem inside the new bigger partition bigger (this is actually in the guide linked above anyway). OR 2b) creating a new partition would be simpler (and safer) if you just want more storage space. Supported formats: raw cow qcow vdi vmdk cloop dmg bochs vpc vvfat qcow2 qed parallels nbd blkdebug hostcdrom hostfloppy hostdevice file qemu-img resize qcow2file1.img 10G qemu-img: This image format does not support resize qemu-img resize qcow2file1. It's quite a lot to copy here, so I'll just link instead for now. This is quite involved and probably the most dangerous part. You need to boot off a LiveCD in your guest for this, since you won't be able to mess with a mounted partition. Check the original image size and resize it with command truncate’: truncate -s +2G raspbian.img. Now your guest can see a bigger disk, but still has old partitions and filesystems.Ģ) Make the partition inside the disk image bigger. I recommend before doing any of this you take a complete copy of the disk image as it is, then when it all breaks you can simply copy it back to start over.ġ) Make the disk image bigger. How do I remove this from the KVM disk image and give it back to the underlying hypervisor? Now GParted is showing 250G of unallocated free space. The output was: WARNING: Image format was not specified for 'nameofimg.img' and probing guessed raw. 30 GB to an existing raw image usethis command: qemu-img resize nameofimg.img +30G In my case, the command was run instantly and it added 30 GB to my existing file, as expected. I tried start parted to manually set the partition size (very dangerous), but doing print all just gives me the error "/dev/sr0 unrecognised disk label".Įdit: By following these instructions, I was able to successfully shrink both my logical and physical volumes (although I had to remember to activate and deactivate lvm before and after certain commands, which the instructions omit. How to easily resize a qemu disk image for Windows To add e.g. I did try sudo pvresize /dev/vda5, but it just says physical volume "/dev/vda5" changed but doesn't actually reduce the size. Despite its name, it does not support resizing LVMs. And please don't tell me to use pvresize. I need to do a lot more then just resize the filesystem. I found the virt-resize tool, but it only seems to work with raw disk partitions, not disk images.Įdit: I'm using an LVM with an Ext4 formatted partition.Įdit: GParted screenshot showing my LVM parition layout. There seems to be a lot answers on how to increase image storage, but not decrease it. I allocated a virtual disk of 500GB (stored at /var/lib/libvirt/images/vm1.img), and I'm finding that overkill, so now I'd like to free up some of that space for use with other virtual machines. How do you decrease or shrink the size of a KVM virtual machine disk?
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