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Bug #3765
closedrbd cp of a zero sized image succeeds with error
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Description
ceph version 0.56-131-gd283abd (d283abdf50b1e4429b775680bfae1bb20c75306b)
while am still surprised about why we need a rbd image of size zero, it allows me to copy the image but throws an inappropriate message "rbd: copy failed: (22) Invalid argument".
Please find below the CLI screenshot,
ubuntu@burnupi24:/var/log/ceph$ rbd create tam --size 0
ubuntu@burnupi24:/var/log/ceph$ rbd ls
tam
ubuntu@burnupi24:/var/log/ceph$ rbd cp tam tamm
Image copy: 100% complete...done.
rbd: copy failed: (22) Invalid argument
ubuntu@burnupi24:/var/log/ceph$ rbd ls
tam
tamm
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