I/O request packet(IRP)

In VAX/VMS, a data structure constructed by the QI/O (Queue I/O) system service to describe a user's I/O request to the device driver. If the I/O request involves a filestructured magnetic tape device, the request will be queued to the appropriate MTAACP. The IRPs are queued according to the priority of the requesting process.; 在VAX/VMS操作系統中,由輸入輸出隊列系統服務程序構造的一種數據結構,用于描述對 設備驅動器的輸入輸出請求。若輸入輸出請求涉及到文件結構的磁帶設備,則請求排到相應 的MTAACP隊列中。IRP根據請求的優先權排隊。