The system checks the dump mode and dump options each time the system or a user requests a dump. The dump mode determines whether the system accepts either a dump request or the options a dump request specifies. The starting dump mode for all four dump types is ADD.
The dump options, whether taken from a system dump options list or from a dump request, specify, for each dump type, the data areas to dump. MVS™ sets up system dump options lists each time you initialize the system. These lists specify the dump mode and dump options in effect for each dump type. The system finds the starting dump options lists for the SYSABEND, SYSUDUMP, and SYSMDUMP dump types in parmlib members IEAABD00, IEADMP00, and IEADMR00 respectively. Because the SDUMP dump type has no corresponding parmlib member, it starts with an empty dump options list.