Thanks for the replies.
Yeah, it's on my friend's old Dell 4300 machine with last BIOS which supported large drives.
It worked for years and then started "clicking" (variation of the click of doom?) on boot up - no xp just scan disk.
Would use the Hitachi utilities to destroy the MBR, repartition, reformat and use Spinrite (GRC software) recover the data, anything to avoid the £££s cost.