I tried to format the WD30EZRX but it won't go beyond 769GB

WD Internal Drives Desktop & Mobile Drives
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I tried to format the WD30EZRX but it won’t go beyond 769MB.  My 2TB drives work fine on my HP desktops.   I only want to use it for storage and not the OS.  I’m running Windows 7 and Windows 8 both 64bit.  The BIOS is not UEFI but when reviewing the settings, the BIOS internal does show the drive at 3TB.  Disk management on both operating systems only displays a 769MB drive and GPT will only format that space.  I tried formatting as a internal and external dive.  No luck.  Also tried it on my MacBook AIR  with Lion and had the same disappointing result. 

Any advice? 

Thanks

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Make sure the drive was not partitioned MBR.

Try deleting the partition and reformat the drive using a GPT partition.

You can use Data Lifeguard Diagnostics to erase the drive.

Check the links bellow for more information:

Hard drives greater than 2 TB do not work on existing operating systems

http://wdc.custhelp.com/app/answers/detail/a_id/2754

How to low level format or write zeros (full erase) to a WD hard drive or Solid State drive

http://wdc.custhelp.com/app/answers/detail/a_id/1211

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Thanks for the input. But I’m using both Windows 7 and 8 64bit which should support drives above 2TBs. And GPT shows and formats at the same 768GB limitation. I will try erasing the entire disk and see what happens.