What feature comes into play to help ensure the completion of the backup should one of three backup devices fail during a backup that is using three different channels?

What feature comes into play to help ensure the completion of the backup should one of
three backup devices fail during a backup that is using three different channels?

What feature comes into play to help ensure the completion of the backup should one of
three backup devices fail during a backup that is using three different channels?

A.
Channel failover

B.
Restartable backups

C.
Rescheduable backups

D.
Automatic backup recovery

E.
Channel recovery

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Jake from SF

Jake from SF

A is correct:

https://docs.oracle.com/cd/B13789_01/server.101/b10734/rcmconc1.htm

Channel Failover

A BACKUP command is decomposed into multiple independent backup steps by RMAN. Each independent step can be executed on any channel allocatedfor the type of device used in the command. If you have multiple channels allocated, and one channel fails or encounters a problem during a backup step, then RMAN attempts to complete the work on another channel. Typically, such retriable errors can occur when a media manager encounters problems with one of several tape drives, or when an instance fails in a RAC environment.

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