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Your customer wants to guard against the simultaneous loss of any two disk drives in his RAID array. Which RAID level can be used to accomplish this?
A. RAID 1
B. RAID 3
C. RAID 5
D. RAID 6
Correct Answer: D
Explanation/Reference:
Industry Standard Architecture – Student Guide 1 – Page 261
RAID 6 — Advanced data guarding
RAID 6, also known as Advanced Data Guarding (ADG), provides high fault tolerance. It distributes two sets of parity data protecting against two drive failures. As the graphic shows, parity (P) is written twice for each piece of data (D). These two sets are different, and each set occupies a capacity equivalent to that of one of the constituent drives.
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