For these cases the SANCHECK utility routine offers user-friendly diagnostic aids. Assistance for two problem areas is offered here:
Detection of generation errors (SUs /390)
Location of error statuses in the SAN
The SANCHECK statement SHOW-SAN-PATH enables specific connection paths to be searched for through the fabric(s) of the SAN between predefined hardware units (channels, controllers) and their status to be checked. When the INFORMATION= *ERROR operand is specified, the SAN0Pnn messages show specifically where there are problems for the generated I/O paths on the SAN.
The SHOW-SAN-CONFIGURATION statement enables specific information on the fabrics, switches and ports to be called. The switches’ connections within a fabric are displayed. The connections (“link neighbors”) and the statuses of the units concerned are specified for all ports on the switches.
For detailed information on SANCHECK, please refer to the “Utility Routines” manual [15].