External Hard Drive - Only one partition is recognized

I have a 1TB GDrive, NTFS formatted, that has been divided into three partitions. When I connect the drive to my Mac Pro, only one partition is recognized. I have tried downloading Tuxera, rebooting the system, and connecting with different cables. Disc Utility only sees the one partition. I have also tried connecting the drive to another Mac with the same results. While this is not a new drive, it has been used for editing on a PC system, this is the first time it has been connected to a Mac. However, this is the first time that my Mac system has had difficulty reading a partitioned PC formatted drive. And when the drive is connected to a PC, all partitions are recognized and all are read as being healthy.
Any ideas on how to solve this issue would be appreciated!

Mac OS only recently added the ability to resize partitions. With Windows there are so many options, tools, and types of partitions; including extended volumes, non-destructive ability to add a drive to and create mirror and stripe RAID.
If you don't have Windows and don't have MacFuse +3G or Paragon NTFS driver... but at least Windows will let you see, or burn one of the Linux type boot CDs to troubleshoot or more.

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