Where are the data blocks of an LV?

Marcin Owsiany <[email protected]>
Newsgroups gmane.linux.lvm.general
Message-ID <CAFsGsxLOyawZH7xxgfLNkh=VftBNAaDStE0XQgQTGf9NmyZ+ZQ@mail.gmail.com> 
Hello,

I know that it is possible to find where a given logical volume's extents
start on a PVs thanks to the information printed by lvdisplay --maps.

I was also able to experimentally establish that the actual data of an LV
starts one megabyte after that location. Is that offset documented
anywhere, or can I somehow discover it at runtime for a given LV?

regards,
Marcin

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