dm-io operations on LVs

Hi all,

I am working with a program which do writing and reading
with the dm-io.

I am wondering whether dm-io can take logic volumes as its
source?
Especially LVs which have md as their physical volumes?

Thanks.

Sorry if I post it on the wrong list. If you know a better
place to ask,
please let me know. Thank you very much.

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