On Thu, 13 Jul 2017, Zdenek Kabelac wrote:
PV has 'header' so the real 'data' are shifted by PV header+lvm2 metadata.
and also LV does not need to be sequential.
However if you have been having a single 'segment' LV and and you calculate
proper skipping offset (typically 1MB) you can try to use such device
directly without lvm2 with a loop device mapping - see losetup --offset
The AIX system used a single segment boot volume LV so that bootstrap
code needed only an offset and did not need to understand the LVM.
But the boot volume was a normal LV in all other respects. I think
there was a flag on the LV to ensure it remained a single segment.
--
Stuart D. Gathman <stuart@gathman.org>
"Confutatis maledictis, flamis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.
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