WD5000ABYS hard drive shows error "Auto-sensing Secondary hard drive 0"

hi,

    My hard drive continually shows this message in bios “Auto-sensing Secondary hard drive 0”, it shows 0 Mb in Bios and unknown device. it is SATA 500GB WD R2,

MDL: WD5000Abys-01TNA0.

My Pc detect it when i click on n check its Property in Bios its Show capacity 0Mb and on header where it must show its name WD etc shows unknown device.

please tell me some solution . i have important data in it.

Regard,

Though your BIOS seems to be recognizing it, your BIOS may still have a drive size limitation.  Try getting the latest BIOS update for your motherboard (as well as all the latest motherboard driver updates).