[one-users] with virt-manager, new VM instance of RAW format works, but new VM instance of qcow2 format doesn't work !!!

[Qiubo Su (David Su)]

dear opennebula community,

the 40GB is the virtual size of the image.vdi image, while the 1.3GB is the
acutal size of the image.vdi image.

just FYI.

thanks,
david su

On Sat, Nov 17, 2012 at 10:43 PM, Qiubo Su (David Su) <qiubosu at gmail.com>wrote:

> dear opennebula community,
>
> i run "VBoxManage clonehd --format RAW image.vdi image.img" to convert
> the virtualbox .vdi vm instance to raw format, and with virt-manager to
> create new vm with the raw format, it works fine, i.e. can start the new vm
> instance successfully and the networking access is the same as before.
>
> but after run "qemu-img convert -f raw image.img -O qcow2 image.qcow" to
> convert the raw format to qcow2 format, and with virt-manager to create new
> vm with the qcow2 format, it doesn't work, i.e. get "no bootable device"
> error when start the new vm with qcow2 format, no need to say the
> networking access.
>
> the size of the ram format disk is about 40GB, while the size of the qcow2
> format disk is about 1.3GB (similar as that of the original image.vdi
> size), nearly 30 times smaller than the raw format.
>
> if not convert the raw format to qcow2 format, then the disk size is too
> large, waste of disk space.
>
> there are ubuntu 12.04, opennebula 3.6.0, and kvm, qemu, libvirt etc
> installed.
>
> it is much appreciated if you can help with this.
>
> thanks,
> david su
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