You don't indicate whether the hard drive is the primary drive or a secondary drive but either way, after a disk is wiped (not "whipped" as you put in your post.), the disk needs to be partitioned and the partition/s need to be formatted to properly show how much space is available . If it's the primary drive, then put the operating system installer disc into the DVD/CD drive and let it partition and format the drive. If it's a secondary drive, then access Windows on the primary drive, then "Disk Management" and partition and format from there. The link below should help you get that done.
Hope this helps.
I've plugged in and whipped an old WD 250gb harddrive as needing the space , but it's Only showing up as 1gb on my pc , can anyone help