The following major diagnostic aids are provided for the Storage Management Subsystem (SMS):

• The SETSMS VOLSELMSG command, for performing problem diagnosis on volume selection.
• A procedure to isolate the source of an SMS message-indicated failure to an area either within SMS or elsewhere, in a non-DFSMS component
• A description of the SMS IPCS dump formatting verb exit (SMSDATA) and examples of SMSDATA usage
• Information about the use of the SMS trace facility
• A description of the trace facility for use with modules that manipulate UNIX files and IPCS formatting with SMSXDATA
• A sample SMS SUMDUMP showing the intermodule communications area (IMC), the recovery communications area (ERRCA), and a partial SMS procedure trace table (ERPTT)
• SMS subcomponent return code and reason code tables