Physical IOCS (PIOCS)

Supervisory routines that schedule and supervise the execution of channel programs. It controls the actual transfer of records between external storage and main storage, and provides I/O device error recovery.; 调度和监督通道程序执行的一种监控例行程序,控制外存和内存之间记录的实际传 送,并对输入输出设备出错提供恢复功能。