Hi,

I try to create a qemu image, but got failed.

ceph@ceph:~/my-cluster$ qemu-img create -f rbd rbd:rbd/qemu 2G
Formatting 'rbd:rbd/qemu', fmt=rbd size=2147483648 cluster_size=0
qemu-img: error connecting
qemu-img: rbd:rbd/qemu: error while creating rbd: Input/output error

Can you tell what's the problem?

Thanks.

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