K, so it's a BIOS or SATA controller that reads the SMART data but doesn't pass it on to the OS... Whoever thought of that shit.
w/e, a SMART warning is a SMART warning, so the replacement should be ok. At least when HP did their homework and interprets the SMART parameters correctly. There's a ton of them and most can differ for every HDD manufacturer...
Or you just hook the HDD up to another mainboard or controller and try to read the SMART values that way.
XI Wiki


