Tom's Hardware > Forum > Storage > General Storage > raid question
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JUSTME05   01-29-2006 at 07:51:20 AM

newbie question. I don't understand why raid (1) halves my storage space. If I have two 80gb drives, I have 160gb storage, right?

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Ruby   01-29-2006 at 08:04:24 AM
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RAID 1 is where your data is redundant to the 2 drives (copied), for purposes of being able to recover any of your information if 1 drive is to get damaged or happens to blow up (hehe) that is why you see half. To use RAID and fully use both Hard Drives, you must use either RAID 0 or RAID JBOD (Spanned RAID), I suggest RAID 0 as it offers more performance than JBOD.

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apache_lives   01-29-2006 at 09:01:41 AM
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raid 1 - both hdds contain matching data and when one dies you still have the other, 2x80=80gb (mirror)

its raid0 that adds both as one "fast" drive at twice the "risk"

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Crazywheels   01-29-2006 at 10:15:55 AM
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raid 0, (stripping) it takes half of one file puts on one hard drive, and then half of there other file on the other hard drive which equals performance, but if one drive goes bad then the other one is bad also. raid 1 is mirroring it puts the exact samething on both drives so if one goes bad then you still have the other one. there is raid 5 where you need 3 harddrives stripping with parity, that means you get stripping peformance but if you lose one drive you still won't lose anything.

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