I have problem with my WD1000B drive, it only recognize after i detect it from bios menu. but after i shutdown my machine, it will gone... So everytimes i turn on my comp, i must enter bios and detect it manually, i already set it to auto detect but failed. My comp spec, Athlon1800, 512 MB pc2100, GA7VTXH+,....... Anyone know what the problem and how to fix it? note : i have check my hdd for bad sector, no, my hdd still good and without bad sector.