PSA PSA PSA: if you use LVM with USB drives you will get absolutely *abysmal* performance by default (especially on HDDs). You must use `pvcreate --dataalignment 2048s` to fix it. Fix requires re-creating PV and copying all data.
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Would probably have to copy the bits to ram, and do it at a direct level. Writing bit by bit in the direction it needs shifted. Some esoteric data/drive manipulation right there. Just a thought.
Well, you can literally dd to/from the same drive with the offset, that should work as long as the new offset is lower, but then you need to fix the metadata/header to reflect the new location of the data. And if it dies in the middle of the move good luck recovering.
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Risky 4 sure. Best to mount in read only and copy to a new device then.
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