How to format 3tb drive gpt on win 7 as external drive

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nonaddictedgamer

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Dec 1, 2011
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I purchased a wd red 3tb to use with my dock station for backups. When it showed up in disk management I could format and use only 2 tb which is due to it being mbr instead of gpt. The other 746.52 gb is not useable nor can I do anything with it. How do I successfully switch both partitions to gpt and make this thing one drive? Preferably in win disk management. Thanks in advance
 
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SuperSoph_WD
Hey there, nonaddictedgamer!

I'm glad you figured out how to solve your problem with the WD Red drive.
In the future, I suggest referring to our knowledge base. There you will find a lot of info about the WD products and how to solve the most common issues with them. http://products.wdc.com/support/kb.ashx?id=6Pg5Y4

As for the default 4096 allocation unit size, this is basically the block size on your HDD when it is formatted in NTFS. The allocation makes a small difference with hard drives nowadays. In terms of space efficiency, the smaller allocation unit sizes perform better (i.e. 4K wastes only 2K per file, whereas 64K wastes 32K.
Though a lot of people prefer the biggest allocation unit size for their photos, music and movies...
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SuperSoph_WD

SuperSoph_WD

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Jul 30, 2014
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Hey there, nonaddictedgamer!

I'm glad you figured out how to solve your problem with the WD Red drive.
In the future, I suggest referring to our knowledge base. There you will find a lot of info about the WD products and how to solve the most common issues with them. http://products.wdc.com/support/kb.ashx?id=6Pg5Y4

As for the default 4096 allocation unit size, this is basically the block size on your HDD when it is formatted in NTFS. The allocation makes a small difference with hard drives nowadays. In terms of space efficiency, the smaller allocation unit sizes perform better (i.e. 4K wastes only 2K per file, whereas 64K wastes 32K.
Though a lot of people prefer the biggest allocation unit size for their photos, music and movies and use the default (smallest one) for their boot partition. But as I said, I don't think it's going to make much of a difference either way.
It's totally up to you.

Hope this helped! :)
SuperSoph_WD
 
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