Help with formatting a hard drive

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I have a 2TB Buffalo External SATA drive and am using OSX.

In disk utilities, it's currently showing as a 931GB Drive with one subfolder titled Untitled 1.

How do I reformat it so that I can get access to the full 2 TB under one folder? I can't seem to install the original factory RAID utility because it is not recognizing the drive however, it shows up in My Computer.
 
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Your Mac's Specs
Mac Mini Core i7 2012 | White 2009 MacBook 2 Ghz | 733 Mhz G4 Quicksilver
You do not say which version of OS X you are using

also, have you considered partitioning the drive, that size drive would use a huge block size would it not

Also - what format are you trying to use on this drive - Mac HFS+ or FAT32
 
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Which model do you have? I thought the 2 terabyte drives were RAIDs with two one terabyte drives. If so, you would use Disk Utility to change the RAID to Level 0. Of course, there are a whole lotta reasons to not do that, but that is another story! Sounds like you have it set up as a RAID Level 1 from those numbers.
 

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