When I set up two HD-s, when will I receive better narration next to MIRRORING or STRIPING mode?

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Answers:
Mirroring doesn't provide any execution increase, just redundancy. If you hold two drives, you'll get increased conduct by using RAID 0.
Raid 0 (Striping). Make sure you have proper backup though because in striping mode when one drive fail, chances are that your information will be irretrievable.
That depends on the rest of your system. Check the following page for the different RAID modes and see which is best for your system.
striping
Reading this article from Wikipedia it sounds like Striped would provide the best performance but would be the least possible tolerant to disk errors. If I was setting up a RAID, I would use mirroring so that even if one drive poor I would have a fully functioning backup.

http://en.wikipedia.org/wiki/raid...
Both are pretty pointless.
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