1.6. Describing Channel Allocation
Channel allocation is a method of connecting RMAN and the target database while also determining the type of I/O device that the server process will use to perform the backup or restore operation. Figure 1.2 illustrates this situation. The I/O device can be either tape or disk. Channels can be allocated manually or automatically.
Figure 1.2. Channel allocation
Manual channel allocation is performed any time you issue the command ALLOCATE CHANNEL. A manual command for allocating a channel is ALLOCATE CHANNEL channel name TYPE DISK. This is used for writing to a disk file system. The command ALLOCATE CHANNEL ...