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i was thinking about getting 2 80gb and eventually 2 more but now im thinking maybe you guys would do something else. I will spend about 150 tops
 

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Raid 0 for speed. Raid 1 for data security. Raid 0 combines drive space so you get 160g out of 2 80's. Raid 1 duplicates information to both drives and you lose 1/2 the space. 2 x80 in raid 1 = 80
 

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If your looking for speed, get RAID 0. It splits data into two parts and writes to both hard drives simultaneously, and you'll be able to use the combined storage of your hard drives (Eg if you have 2 80GB hard drives you can use 160GB of space). But if one of your HDDs fail, you lose all of your data.
If you have a lot of important files on your computer, go with RAID 1. It works like RAID 0, writing to both disks at the same time. But instead of splitting the data into two parts it makes another copy and puts it on the spare drive. With RAID 1 though, you can ony use the amount of space of one hard drive (Eg if you have 2 80GB hard drives you can only use 80GB).
 

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Well the best RAID array IMO would be 4 of any hard drives really in RAID 0 and if you have important data you could have a larger drive just for backing up the files (or for saving school/work stuff and movies and music on that) so 4x80GB sounds pretty good. Obviously 4x150GB Raptor Xs is better but those are $349 EACH!
 
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