Editing a CTC connection

Since CTC connections are not displayed as visible objects in the configuration diagram (only their cables are shown), they cannot be selected directly for editing. Choose CTC Connections... from the Edit menu to open the CTC Connections dialog. Select a connection from the list and press Edit... the Edit CTC Connection dialog appears. Alternatively, after you have created a CTC connection, pressing OK in the Create CTC Connection dialog automatically displays the edit dialog.

Figure 1. CTC Connections

CTC Connections dialog. This dialog is accessible from the HCM product and includes accessible help information.

In the Edit CTC Connection dialog, you can view all control units and I/O devices comprising the selected CTC connection. The dialog shows two lists, side by side.

Figure 2. Edit CTC Connection

Edit CTC Connection dialog. This dialog is accessible from the HCM product and includes accessible help information.

The left-hand listbox shows all of the control units connected to the CTC CHPID, or FC CHPID in case of an FCTC connection, that represent images available via the CNC or FCV CHPID, or FC CHPID in case of an FCTC connection.

Note: For purposes of this discussion, the term “image” refers to either a partition on an LPAR host, or the processor itself if it is running in BASIC mode.

There is at least one entry per image, even if there is no control unit connected that represents the partition, in which case all data columns except “Destination on ....” will be blank. If the control unit has a discontinuous range of devices connected to it, or if the device range is made up of a mixture of CTC and BCTC devices, then there will be one or more subentries under the main entry that show additional device ranges. For instance, if control unit 4110 had devices 4110-4113 and 4116-4117 connected (discontinuous), and control unit 4120 had devices 4120,4 (CTC) and 4124,4 (BCTC), the entries would look like shown:

4110   4110,4          00        LPAR11
       4116,2          06
4120   4120,4          00        LPAR12
       4124,4 (B)      04

Each control unit or image comprises a single selectable row, even if it consists of multiple lines of text showing different device ranges; for instance, selecting either the 4110,4 line or the 4116,2 line will select the entire 2-line entry for CU 4110, which represents image PART11.

The right-hand listbox is identical; the only difference is that it displays all of the control units connected to the CNC or FCV CHPID, or FC CHPID in case of an FCTC connection, that represent images available via the CTC CHPID, or FC CHPID in case of an FCTC connection.

For images that have no control units to represent them, you may click Add New... to create new control units and devices to represent the image, or Add Existing... to select an existing CTC control unit that may be connected to the CHPID so as to represent the selected image. For images that have control units, you may click Edit... to open the Edit Control Unit dialog, CU <=> Proc... to open the Control Unit <=> Processor Definitions dialog, or I/O Devices... to open the I/O Device List dialog. You may also choose to disconnect the control unit from the CHPID (and possibly delete the control unit and its devices) by clicking Remove.

Note: The Edit CTC Connection dialog can sometimes be preceded by the Accept Proposed CTC Control Units dialog. It will appear in those cases where HCM finds that not all images in the connection are represented by control units, and where there are CTC control units already in the IODF that would be suitable to represent those images based on current usage. These control units will appear in gray in the listboxes. After you accept or reject these proposed CHPID-control unit connections, the Accept Proposed CTC Control Units dialog will be replaced by the normal Edit CTC Connection dialog.