OS X can "see" just about any disk and that includes disks that are formatted as NTFS (normal Windows format)
The disk should mount on the desktop unless there is something wrong with it.
To "repair" that disk, assuming it is still formatted as NTFS, you will need to be working on it on the PC and using PC repair tools.
You say that in Disk Utility, the disk is seen. Select the disk and choose Erase or Partition. Choose the type of format that you require, HFS+(journaled), and erase the disk.
While Disk Utility can "see"an NTFS formatted disk, I don't believe that it can perform any form of maintenance on it.
Okay I bought Newertechnology 1 terabyte ministack V3. Connected it to my Macmini (newer style), time machine started, everything was fine. I have a lot of itunes music and pictures on my old PC laptop that I wanted to put on my Macmini.
I reformatted the ministack so I could use it for my PC which was already preformatted for MAC the latest version of MAC OS X.
Transferred everything fine to my Mac Mini. Now I want my ministack HD formatted back so that i can use it for my MAC because right now it doesnt see it. I tried utility disk and I keep getting at Error message saying "File system verify or repair failed".
Can anyone help me out? Thanks