Note that when installing Ubuntu with LVM + multipath, curtin adds a
filter for LVM. This allows the target system to avoid the situation
where LVM "steals" /dev/sdN devices that would normally be used by
multipath.

$ grep filter /target/etc/lvm/lvm.conf
      filter = [ "a|/dev/disk/by-id/dm-uuid-.*mpath-.*|", 
"a|/dev/disk/by-id/.*dm_crypt-.*|", "r|.*|" ]


Unfortunately, we can't really use that filter in the live environment - since 
it would prevent LVM to work when multipath is not involved.

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https://bugs.launchpad.net/bugs/2080474

Title:
  ubuntu installation failing for systems having SAN disk

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