A。 The required result and the optional results。 B。 The required result and one of the optional results。 C。 The required result only。 D。 Does not produce the required result or the optional results。 B To strip set with parity， when one disk fails， data integrity will still be maintained， and the read access time will be improved， because it can read data from several disks at one time。 But because the strip set with parity need to compute parity information， this will use additional processor time。
56。You have the jobs to make new custom fault tolerance standard for your company。 Required results: Data integrity must be maintained when one disk fails。 Optional results: The fault tolerance method must not use additional processor time。 The read access time must be improved。 Proposed Solution: Introduce a stripe set。 What does the proposed solution produce?
A。 The required result and the optional results。 B。 The required result and one of the optional results。 C。 The required result only。 D。 Does not produce the required result or the optional results。 D The strip set can"t offer the ability of fault tolerance。
57。You have the jobs to make new custom fault tolerance standard for your company。 Required results: Data integrity must be maintained when one disk fails。 Optional results: The fault tolerance method must not use additional processor time。 The read access time must be improved。 Proposed Solution: Introduce disk duplexing。 What does the proposed solution produce?
A。 The required result and the optional results。 B。 The required result and one of the optional results。 C。 The required result only。 D。 Does not produce the required result or the optional results。 A To disk duplexing， when one disk fails， data integrity will still be maintained。 The read access time will be improved， because it can read data from two disks at one time。 And disk duplexing will not use additional processor time。
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