Dynamic Refresh of I/O Control Data
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-04
This article describes a mechanism to dynamically alter the I/O control data in a data processing system, required by the I/O subsystem, without having to re-initialize the complete system. The system control program will be running with one set of I/O control data, when it is desired to alter the data. (New or additional I/O has been added.) The initial build of the system area which is the location of the I/O control data is built such that the area will always be larger than required. This will allow a new level of I/O control data to be loaded in the same area of the running level with additional control data getting into the previously set-aside extra space.