Data transmission method and device

The invention discloses a data transmission method and device, and the method comprises the steps: enabling a multi-storage device to transmit data to a plurality of sub-storage devices managed by the multi-storage device according to a transmission task from a processor, the data on the source address in the sub-storage device corresponding to the source logic device identifier is copied to the destination address in the sub-storage device corresponding to the destination logic device identifier, and the central processing unit does not need to execute reading and writing operations, so that the processing time delay of the central processing unit is reduced. 本申请公开了一种数据传输方法以及装置，该方法包括：多存储设备根据来自处理器的传输任务，将该多存储设备所管理的多个子存储设备中，源逻辑设备标识对应的子存储设备中的源地址上的数据复制到目的逻辑设备标识对应的子存储设备中的目的地址上，不需要中央处理器执行读取和写入操作，减少了中央处理器的处理时延。