Updating the SDWA

A recovery routine can update the SDWA in various ways:

By issuing the SETRP macro (See Using the SETRP macro to update the SDWA.)
By issuing the VRADATA macro (See the VRADATA macro in z/OS MVS Programming: Assembler Services Reference IAR-XCT and use of the VRADATA macro in Symptoms provided by a recovery routine.)
By directly updating specific fields (see Important fields in the SDWA).