Raid?

[alra111]

I was looking at this HD:

http://www.westerndigital.com/en/products/products.asp?driveid=621

Could someone please summarize for me what is a "Dual-drive Storage System with RAID?"

I have some ideas of what it is... it involves mirroring, and holding two copies of data to make sure one doesn't lose data, correct?

This is a 4 TB drive... what if I want 4 TBs worth of storage and not two copies of 2 TBs worth of storage? Am I allowed to turn mirroring off and get a straightforward 4 TBs worth of storage?

Please feel free to throw in any quick facts about RAID you may want to.

Alra111

 

[DeltaMac]

Wiki article - http://en.wikipedia.org/wiki/RAID

The mirrored RAID (RAID 1), where you have two full sets of data, gives you safe storage of your files, and the loss of one drive would leave all your data intact. The W-D drive would have 2 2GB drives, and mirroring would give you 2 GB of storage (twice). That's not the only type of RAID, so you could set that drive up for RAID 0 - striping, which gives you 4 GB of space, and the data alternates between the drives, for blazing speed. But, if you lose one drive, you lose ALL your data.
Look through the article for lots of other RAID types