raw and qcow2 format

fereshteh loghmani fereshtehloghmani at gmail.com
Thu Jun 16 06:38:43 UTC 2022

I have a question about disk format in OpenStack.
I created a new server and shut off that server and with the command
qemu-img info disk I found my "disk format" in qcow2 and it shows the
"backing file format: raw".
could you tell me why these 2 are different?
(I use OpenStack without ceph and without volumes.)
thank you
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