Which of the following is not an advantage of block media recovery (BMR)?
A. Reduced MTTR.
B. Datafiles remain offline while corrupt blocks are repaired.
C. Datafiles remain online while corrupt blocks are repaired.
D. A and C
Option A is incorrect beacuse reduced MTTR is an advantage of BMR.Option C is incorrect because the datafiles remaining online is an advantage of BMR.Since A and C are advantages,D is also incorrect.Option B is the correct choice because it is not an advantage of BMR.
MTTR(Mean Time To Recover)
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原文：http://www.cnblogs.com/Babylon/p/7827535.html