Hi guys, This is my first post so bare wih me! A few days ago my mac started hanging on the GSOD, and nothing worked to fix it! I ended up formatting and starting over using the install disk. I finished formatting a few hours ago, but now none of my 4 external hdd's are working! The strange thing is that they do still work perfectly on my windows 7 laptop. They have worked on both windows and mac for the last year no problem, so I know it is not a formatting error (they're all exFat). Ive tried disk utility to repair, but the drive is greyed out. Ive also tried DiskWarrior which says it cannot repair the disk before I even try. The error I get on my mac is 'this computer was not able to read the disk' error, with options to eject and ignore. Any help would be hugelu appreciated!