Alasdair G Kergon wrote:
But I don't yet see why it didn't also open the other devices, write a warning message about duplicate IDs, and do the right thing and give them precedence.
Why would it open the other devices? LVM does not scan /dev/mapper/*, only /dev/sd*. Since it does not scan the /dev/mapper devices for pvs, it sees no duplicates and can not "do the right thing".
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