1. A computer program product comprising a computer useable storage medium having a computer readable program, wherein the computer readable program, when executed on a data processing system, causes the data processing system to: access vital product data (VPD) information for each of a plurality of data processing devices within the data processing system; identify one or more data processing devices of the plurality of data processing devices that are powered-on to a fully functional state; measure an actual holdup capacitance time for a power supply module asserting an Early Power Off Warning (EPOW) signal; store the actual holdup capacitance time in a vital product data (VPD) storage device associated with the power supply module; determine a current power distribution network configuration relative to the one or more data processing devices based on the identified one or more data processing devices that are powered-on to a fully functional state, in response to the power supply module of the data processing system asserting the EPOW signal; and assert a power loss notification signal, indicative of an imminent power loss to the data processing device, to logic of the data processing system based on the determined current power distribution network configuration relative to the one or more data processing devices, wherein the current power distribution network configuration is determined based on the actual holdup capacitance time stored in the VPD storage device associated with the power supply module.