Loading and Saving Discontiguous Saved Segments Note that DOS linkage editor messages (if they occur) are written to
the virtual console as well as the linkage editor map during VSAMGEN processing. Information messages (I-level, return code = 4) may occur
due to phase construction and will not cause the EXEC to terminate
execution.
Next you must respond to the VSAMGEN message: DMSVGN370R ENTER 'GO' IF SAVED SYSTEM IS TO BE CREATED, OTHERWISE 'QUIT' At this time the DOSLIB has been created and if you do not require
the link-edit listing, enter 'GO'. However, if you desire to modify the VSAM or AMS systems, enter 'QUIT'. This will preserve the DOSLIB on
your A-disk and you can wait until you have the link-edit listing before
continuing. If you responded 'BOTH' to message DMSVGN264R, the EXEC will then create the CMSAMS DOSLIB. When you are ready to continue,
invoke the VSAMGEN EXEC and reply RESTART to the message: DMSVGN360R ENTER 'INSTALL', 'UPDATE' OR 'RESTART'
making sure that the required DOSLIBs are on your A-disk and reply to
the succeeding messages as before.
Next you must respond to a VSAMGEN message and enter the load address
for CMSVSAM. This address must be entered in hexadecimal characters; it
must be an address beyond the size of the virtual machines that will
attach it. The prompting message is: DMSVGN363R ENTER LOCATION WHERE CMSVSAM WILL BE LOADED AND SAVED: If your installation DMKSNT was defined to be identical to the example
shown in Figure 31 you would enter: 110000 (1088K). If you enter the
load address incorrectly, you receive the message: DMSVGN360E INVALID RESPONSE 'location'. VSAMGEN fetches the VSAM modules and loads them at the address you
specified. You receive the message:
followed by messages from the FETCH command describing the entry point
of the modules being fetched. Now the message: DMSVGN371R system IS LOADED, IF ZAPS ARE TO BE APPLIED GO INTO 'Cpt MODE, ELSE 'NULL' is issued. The system has been loaded into the location requested and
if no modifications are required press the ENTER key. If modifications
to the system are required, press the ATTENTION key to enter CP mode and
make the desired modifications; then enter BEGIN to return to CMS mode
and press the ENTER key. Next you must respond to a VSAMGEN message
with the name of your installation's VSAM segment. DMSVGN366R ENTER NAME OF SYSTEM TO BE SAVED: In this example you respond:
cmsvsam
274 IBM VM/370 Planning and System Generation Guide

Loading and Saving Discontiguous Saved Segments VSAMGEN assigns a storage protection key of X'F' to the first five
segments, the shared portion of VSAM, and a storage. protection key of
I'E' to the last segment, the nonshared portion of VSAM. Then VSAMGEN saves VS AM. VSAMGEN issues the following message, which indicates that the VSAM discontiguous segments are saved. DMSVGN365I SYSTEM segmentname SAVED VSAMGEN then issues the following message to ask you if you want it
to erase the DOSLIB that it created: DMSVGN368R ERASE CMSVSAM DOSLIB? ENTER "YES" OR "NO": Answer "yes" unless you are using a larger minidisk than MAINT 191. otherwise, there will not be enough disk space for C5SAnS construction. If any errors occur during the VSAMGEN procedure, the action
required to complete the procedure is as follows:
1. If an error occurred before message DMKSVGN364R was issued you must
reinvoke the VSAMGEN EIEC.
2. If an error occurred before any DOSLIBs were created, you can
reinvoke the VSAMGEN EXEC and respond 'UPDATE' to message DMSVGN360R. The system will then prompt you for the systems to be
generated and ask if tape or cards are to be used for the PTF application. Respond 'CARDS' and when a request for the module
name is presented, enter 'END'. The system will then start
creating DOSLIBs. 3. If an error occurred after a DOSLIB was created you can reinvoke
the VSAMGEN EXEC and respond 'RESTART' to message DMSVGN360R. 4. If an error occurred after the CMSVSAM DOSLIB was created and you
had entered iBOTHi to message DMSVGN264R, you can reinvoke the VSAMGEN EXEC, respond 'CMSVSAM' to message DMSVGN264R and respond 'RESTART' to message DMSVGN360R. Once the CMSVSAM segment is
saved, reinvoke the VSAMGEN EXEC, respond 'UPDATE' to message DMKSVGN360R and proceed as in step 2 to create the CMSAMS segment. VSAMGEN then continues by installing the access method services
segments. VSAMGEN link-edits the access method services modules and
places· them in a CMS phase library called CMSAMS DOSLIB. You receive
the following messages: DMSVGN365I LINK-EDITING CMSAMS ••• DMSVGN363I CMSAMS DOSLIB CREATED ON DISK 'A'.
Note: While VSAMGEN is installing access method services,
information messages and the linkage editor continues. A greater than 4 causes VSAMGEN to terminate.
you receive
return code You are then prompted to enter the load address for the access method
services segments. DMSVGN363R ENTER LOCATION WHERE CMSAMS WILL BE LOADED AND SAVED: In this example, enter: 170000 (1472K). Part 3. Generating VM/370 (CP, CMS, RSCS, and IPCS) 215