I've been recently dealing with an LVM + LUKS partition trying to install a new linux (ubuntu in this case).
I tried a few different options to make it work, but the pc resisted, the only system I could make work was the 32bit version of ubuntu 12.04. After succeeding with this (discarding all the twists to make the encryption work) I thought give it another try with the 64bit version since the pc is a 64bit after all. But at this time I didn't re-set up the LVM nor re-partitioned it at all.
Right now, and just out of curiosity I would like to know, how architecture-dependant or not may an LVM partition be?
I mean, was I wrong by assumming I didn't need to repartition/reformat it before installing a 64bit system?
Thanks for any information!