This section contains overviews of the major diagnostic aids that are provided for VSAM subcomponents, and cites publications that contain more detailed information. Each subcomponent is discussed in a separate section:

• Access Method Services (AMS) diagnostic aids
• Catalog management diagnostic aids
• VSAM OPEN/CLOSE/End-of-Volume (O/C/EOV) diagnostic aids
• VSAM Record-Level Sharing (RLS) diagnostic aids
• VSAM record management (R/M) diagnostic aids
• VSAM record management return and reason codes