I just want to write a small note on the topic of LVM data safety.
The version of LVM that ships with 16.04 cannot handle duplicate UUIDs.
If you so much as DD a disk to another drive and run a single LVM
command, your running system will be ruined.
Chances are high LVM will prefer the new backup over the old and do a
live swap of backing devices which will corrupt all open files and their
inodes.
Naturally this will only happen on a running system but it's what people
sometimes do.
(Aside from that of course this thing may also happen while running from
a Live version, but the impact will be less).
The version shipping with 16.10 doesn't have this behaviour but it is
rather not a safe measure to be trusting you or anyone will Always be
able to and remember to upgrade their versions prior to anything like
this happening.
That's all I can say about this. Regards.
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