it's faster but if one drive fails you lose everything.
https://en.wikipedia.org/wiki/RAID_0#RAID_0Why use RAID? What do you really gain by it?
https://en.wikipedia.org/wiki/RAID_0#RAID_1More info to fill your mind
https://en.wikipedia.org/wiki/RAIDI will be using two SSD's in raid 0 soon, and two hdd's in raid 1 for recording & storage.
Edit:
Basically, raid zero can become faulty, but this is what image cloning is for aka backup of your raid 0.
Raid 1 with two drives or more = mirrored, if one hdd fails, the storage will be on the second or more hdd. = prevent loss of data.
Also you may break up the raid1 and have two or more hdds with identical information, you should be pretty much clear on this now
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