Windows cannot read hdd,but it is visible in bios

hye evrybody.
im currently using WD hdd as my second i see,the hdd can be seen at bios.'4th master:WDC WD10EARS.ultra DMA Mode-5, S.M.A.R.T. capable and status OK.the problem is, the hdd cannot be seen in windows.there was no ‘local disk’ detected.only my primary hdd is detected.but when i check at device manger, for somehow both hdd are readable?is there any problem with my 2nd hdd?can u suggest solutions?thank you guys

Did you check in Disk Management?  If it shows up in there, then you probably haven’t partitioned and formatted the drive yet.