Re: [Qemu-discuss] qcow2 import error

[Max Reitz]

On 11.06.19 15:11, Konstantinos Papadopoulos wrote:
> Well If I get the question correctly, you are asking about the output of
> the amended command?
> if so, please find the output below
> [root@overcloud-compute-6 nova]# qemu-img amend -f qcow2 -o compat=0.10
> aat-1.1-amend.qcow2 -p
>     (100.00/100%)
> 
> which by the way takes place spontaneously.

No, I’m asking what the "file" tool thinks of the file.  It should be
able to detect the qcow2 version. fpr example:

$ qemu-img create -f qcow2 foo.qcow2 64M
Formatting 'foo.qcow2', fmt=qcow2 size=67108864 cluster_size=65536
lazy_refcounts=off refcount_bits=16
$ file foo.qcow2
foo.qcow2: QEMU QCOW2 Image (v3), 67108864 bytes
$ qemu-img amend -f qcow2 -o compat=0.10 foo.qcow2
$ file foo.qcow2
foo.qcow2: QEMU QCOW2 Image (v2), 67108864 bytes

Note the "(v3)" vs. "(v2)".


I’m wondering whether the amend process is buggy or whether something
else is going on.

Max

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