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The Mantis ticket 1353 <https://mantis.uefi.org/mantis/view.php?id=1353> and Mantis ticket 1472 <https://mantis.uefi.org/mantis/view.php?id=1472> updated the description of the port multiplier port number parameter in SATA Device Path Node and ATA Pass-Through Protocol. Now, this parameter should be set to 0xFFFF instead of 0 to indicate that an ATA device is directly attached on the controller port. Please note that this is an incompatible change. The consumer of SATA device path or ATA_PASS_THRU needs to re-examine its usage to follow UEFI 2.5 mantis 1353 and 1472. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Hao Wu <hao.a.wu@intel.com> Reviewed-by: Feng Tian <feng.tian@intel.com>