This read-only display string gives a text description of the memory module's hardware location on complex multi-SBB systems, with a null string meaning the location is undeterminable or irrelevant. It matters for physically finding a module in enclosures with multiple server building blocks. For example, on a multi-node enclosure an admin reads cpqSiMemModuleHwLocation to determine which physical compartment holds the memory module flagged with an ECC fault.