The I/O path list

The I/O Path List is the output of the verify function available on the Active Sysplex Member List and the Activate or Verify Configuration Dynamically panel (see Verifying a configuration against the local systemVerifying a configuration against a system in the sysplex). The list compares the configuration in the accessed or the active IODF with the actual configuration as sensed from the system.

The report extends over two pages and can be scrolled horizontally.

Figure 1. I/O Path List
--------------------------------------------------------------------------  
                              I/O Path List       Row 217 of 627 More:      
Command ===> ___________________________________________ Scroll ===> CSR    
                                                                            
Accessed IODF: SYS4.IODF00                                                  
Active IODF  : SYS4.IODF00                             System . : HCD4      
Processor . .: M313       Partition : HCD4             OS config: MVSVM     
                                                                            
----I/O Path----- ----------Sensed Data--------- ----IODF Data---------- D  
CHP CU   DEV      STAT CHT   CUTYPE   DEVTYPE  O CHT CUTYPE   DEVTYPE  S    
3C  5900 5900,256      FC_S  2107-981 3390B    Y FC  2107     3390B         
3C  5A02 5A00,16       FC_S  2107-981 3390B    Y FC  2107     3390B         
3C  5A02 5A10,11  7    FC_S  2107-981 3390B      FC  2107     3390B         
3C  5A02 5A1B,195      FC_S  2107-981 3390B    Y FC  2107     3390B         
3C  5A02 5ADE,2                                  FC  2107     3390B      *  
3C  5A02 5AE0,32                                 FC  2107     3390A    0 *  
3C  5B03 5B00,224      FC_S  2107-981 3390B    Y FC  2107     3390B         
3C  5B03 5BE0,32                                 FC  2107     3390A    0 *  
3C  5C01 5C00,16  7    FC_S  2107-981 3390B      FC  2107     3390B         
3C  5C01 5C10,168      FC_S  2107-981 3390B    Y FC  2107     3390B         
3C  5C01 5CB8,3   7    FC_S  2107-981 3390B      FC  2107     3390B         
3C  5C01 5CBB,13       FC_S  2107-981 3390B    Y FC  2107     3390B

For each channel path sensed and/or defined in the accessed IODF, the list contains a row showing the I/O path and the sensed and defined channel path, control unit, and device information. If a switch is included in the path, the right page shows the corresponding switch information.

Any discrepancies between the defined and the sensed data are indicated in column D on the right. For channel paths for which column D is blank, the defined and sensed data are consistent. The following values may appear:
Symbol
Meaning
*
Defined and sensed I/O paths differ
C
Defined only to processor but not to OS
O
Defined only to OS but without a path to the processor
@
A combination of * and C
On the display column D is highlighted.
Columns STAT and O indicate the status of the I/O path and the connected device, respectively. An empty field means that the corresponding I/O path or device is online. Offline I/O paths are marked with OFFL and offline devices with Y. If the system is unable to sense the status of an I/O path, it is marked UNKN. If a path is online, HCD checks, whether a single point of failure (SPOF) can be found for this path. If yes, this single point of failure is mapped to the following
  • BLANK: Sensed I/O Path is online and no SPOF exists

    If the sensed I/O path is online and a SPOF exists, an up to four digit number is shown with a SPOF indication as follows:

  • Position 1 contains blank or SPOF indication 3 (book), 5 (fail-over domain), 6 (fan-out), 7 (domain), 8 (secondary STI/STI).
  • Position 2 contains C if the controller interface shares a SPOF.
  • Position 3 contains P if the device has only one path online.
  • Position 4 contains S if all paths go through the same switch.

Asterisks (*) in the CHT (channel type), CUTYPE (control unit type), or DEVTYPE (device type) columns indicate that I/O paths are returned but the values for the corresponding types are blank or invalid.

For certain configurations the I/O path list, although restricted to one processor or partition, can be extensive. Using the Filter action you can reduce the list to the entries of interest.

You can save the displayed list by entering SAVE in the command line on the I/O Path List.

Note: The LOCATE command is not available for the I/O path list.