7.4. Block Media Recovery
Block Media Recovery (BMR) is a Recovery Manager (RMAN) feature that was new in Oracle 9i. BMR is used to recover an individual block or a group of corrupt blocks in a datafile. This allows you to recover individual data blocks instead of the whole datafile. BMR should be used as a supplement to datafile recovery, not as a replacement. BMR is best used where block corruption is minimal, not widespread. Block corruption cases that are not widespread where memory corruptions or sporadic I/O errors get written to disk are best suited for BMR.
Nevertheless, BMR has some major advantages over recovering the whole datafile. One big advantage of using BMR is that it reduces the mean time to recovery (MTTR), because only the ...
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