文档解释
ORA-19669: proxy copy functions cannot be run on DISK channel
Cause: A proxy copy procedure was called, but the device which is allocated to the current session has type DISK.
Action: Allocate a non-DISK channel and retry the operation. Note that proxy copy requires a 3rd-party media management software product that supports the this backup/restore feature.
ORA-19669: proxy copy functions cannot be run on DISK channel 是一个系统级的错误，它表明在给定的通道中，代理拷贝（proxy copy）函数无法正常运行。这是由于磁盘通道不支持代理拷贝。
