Hard Drive Not Showing Up! Need Help!

[Alpaca_1]

I recently got a hard drive with windows 7 on to add on to my already existing hard drive. I wanted to delete windows 7 off of it and one tutorial said to go to disk management and delete volume. After I did that the disk disappeared and I can't get it to show up again. My bios detects it but disk management doesn't. I already scanned for hard drive and it still didn't show up. I need help!

 

[Deweedos]

Sounds like you need to reallocate the space on a disk to a new sector and it is unformatted, all you have to do is go into disk manager, right click the drive and select new simple volume, then set the size of the partition to the entire disk.