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RAID 1 - 2tb and 640gb

Tags:
  • NAS / RAID
  • Caviar
  • Storage
Last response: in Storage
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June 26, 2012 6:09:52 AM

Hi all,

I've never used RAID before, but I was interested in RAID 1. I have two drives:

Drive A - 640 gb Caviar Black
Drive B - 2 tb Caviar Green

What I want to do is create a backup (RAID1) of my Drive A onto my Drive B, and use the remaining space as a data partition.

So I want 3 partitions:
A - Drive A - 640 gb (Primary)
B - Drive B - 640 gb (Backup)
C - Drive B - 1408 gb (Misc data)

Is this possible?

More about : raid 2tb 640gb

Best solution

a c 545 G Storage
June 26, 2012 11:06:11 AM

No. This is how you calculate the size of a RAID-1 array:

Storage Efficiency: 50% if drives of the same size are used, otherwise (Size of Smaller Drive / (Size of Smaller Drive + Size of Larger Drive) ) said:
Storage Efficiency: 50% if drives of the same size are used, otherwise (Size of Smaller Drive / (Size of Smaller Drive + Size of Larger Drive) )


So the total size of your RAID-1 array with those 2 drives would be 633.6GB.

Your drives need to be equal size for maximum storage efficiency.
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July 3, 2012 12:01:47 AM

Best answer selected by sirgogo.
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