Shrinking a qcow2 image

[mathgoy]

Hi all, 

 

I accidently increased the size of my Home Assistant qcow2 image (to 162GB!) and I would like to shrink it back to 60GB.

Do you have any idea how I could do that safely?

 

Thanks a lot!

[mauriceatkinson@btconnect.]

did you ever get this resolved as I have the same problem?

[JackSafari]

I did the exact same thing. 

I immediately discovered the error before starting the VM and attempted to resize it from 15T to 1500G
The unraid UI will not allow me resize it smaller even though I have not restarted the Windows VM.  The size remains at 15T

My entire unraid server is only 12T.

The VM is important. I can't wipe it and start all over. 

Looking for suggestions on how to reduce the vdisk from 15T --> 1500G or revert back to the original size of 1000G

Edited August 4 by JackSafari

[Kilrah]

Since you haven't expanded the partitions yet you should be able to do a 

qemu-img resize vdisk.qcow2 --shrink 1500G

Back up the vdisk first.

 

Or just restore a vdisk backup from before the change.

Edited August 4 by Kilrah

[JackSafari]

Thanks. This solved it. 👍

 

qemu-img resize vdisk.qcow2 --shrink 1500G

 

The unraid UI reports 1500G as being 1TB. I checked using qemu-img info and it reports the correct size of 1500G, and Windows 10 recognizes it at 1500G

Edited August 4 by JackSafari