How reman backup blocks being written from memory to disk

Hi all

I think about a case when backup with RMAN's data files.
The rman is subject to block A backup when this block is written by DBWR memory to disk.

Suppose that writing is carried out only partially. In this case, what will make RMAN?

1. wait until the entry is made and save
2. save that RMAN see you there

I wonder if the choice 2 will leave the incompatible block and thus be taken as corrupt during restoration.

Best regards
Leon

Oracle uses checkpoints that ensure that all databases upward at the checkpoint SCN of the changes have been recorded in the data files. When a user commits a transaction, guarantees of Oracle who do it again so that these changes are written in it again recorded on the disc. Changed blocks of data will be written to the data files later. In fact the data is written to the data files and Oracle simply updates the headers of database with the updated SNA. RMAN does not backup of online redo log files.

http://docs.Oracle.com/CD/B19306_01/backup.102/b14191/rcmconc1.htm#i1008641

RMAN does not require that you put data in backup mode files. During an RMAN backup, a database server session reads each block of the data file and verifies that each block is broken by comparing the block header and the footer. If a block is broken, the session reads the block. If the same divide is found, then the block is regarded as permanently corrupted. If MAXCORRUPT is exceeded, the backup stops.

Tags: Database

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