Loading and Saving Discontiguous Saved Segments Device
Type
2314
2319 3330 1
33 30 11 3340 3344 3350 Number of DOS User 10 10 6
6
15
15
3
Cylinders Required:
as User 20 20 12
12 30 30 6 DOS users can use the MlINT 191 supplied with the starter
system to generate VSAM and access method services without obtaining
additional minidisk space, but they must erase the DOSLIBs when
asked. as users should define sufficient A-disk space as indicated
in the table. • IPL a CMS system with sufficient virtual storage (in the example
shown in Figure 31, 2 112K) :
define storage 2112K
ipl 190 parm seg=null • Since the CMS/DOS segment called INSTVSAM is used to install the CMSVSAM and CMSAMS segments, you must define the system name of the CMS/DOS segment. To do this, issue the command:
set sysname cmsdos instvsam
Then link to and access the restored DOS/VS starter system.
cp link dos 342 342 rr read
access 342 d
set dos on d
The S-disk must be accessed as a read-only extension of the A-disk.
access 190 b/a
Invoke the VSAMGEN EXEC procedure by entering:
vsamgen VSAMGEN prompts you to enter INSTALL if you are installing VSAM and
access method services or UPDATE if you are updating the already
installed VSAM and access method services routines.
requires that you indicate whether you are an as
prompting messages are: DMSVGN360R ENTER 'INSTALL' 'UPDATE' OR 'RESTART' DMSVGN361R ENTER EITHER 'DOS' OR 'OS' or VSAMGEN also DOS user. The
Respond INSTALL and DOS or as. If
all system modules are transferred
the CMS disk in TEXT file format.
dispose of the DOS starter system.
user, reply as a DOS user. INSTALL is specified for an as user,
from the DOS relocatable library to
This allows the as installation to
If you are both an OS and a DOS VSAMGEN requires a read/write A-disk
available. If an A-disk is not available,
following error messages and terminates: DMSVGN069E DISK 'A' NOT ACCESSED. DMSVGN361E DISK 'A' IS NOT A CMS DISK. and checks that one is VSAMGEN issues one of the
272 IBM VM/370 Planning and System Generation Guide

Loading and Saving Discontiguous Saved Segments You are prompted to enter the release level of the DOS/VS starter
system you are using: ENTER RELEASE OF THE DOS/VS STARTER SYSTE": Enter 34. If you enter an unsupported release number, you receive the
message INVALID - RELEASE 31 OR LATER REQUIRED an d the VS AMGEN EXEC procedure is terminated.
You are now prompted to indicate whether you want to install VSA" or
access method services or both: D"SVGN264R ENTER OR 'CMSA"S' OR 'BOTH' FOR GENERATION OF l1EW SY STEM (S) If you receive the message: INPUT FILE 'VSA"33 DOSLNK *' NOT FOUND the probable cause is that the system disk is not accessed as a
read-only extension of your A-disk.
Next, VSA5GEN issues a message asking you to identify the DOS system
relocatable library: DMSVGN362R ENTER "ODE OF DOS RELOCATABLE LIBRARY DISK: Respond with the filemode of the DOS/VS starter system disk, which you
linked to and accessed before invoking VSAMGEN. If the filemode you
enter is not the filemode of a DOS disk, you receive an error message
and VSAMGEN processing is terminated. DISK 'fm' IS NOT A DOS DISK. The System Name Table provided with the VM/370 Starter System was created assuming DOS/VS Release 34. VSAAGEN checks that the files it requires are on an accessed disk;
these required files are shipped on the CMS system disk. VSAftGEN next
invokes the environment and makes the DOS/VS starter system disk
available as the DOS/VS system residence volume.
For as users only, invokes the RSERV command and creates CftS text files for all the required VSAft and access method services modules
in the DOS/VS relocatable library. The as users of VSAft and access
method services thus are not required to keep the DOS/VS starter system
disk. as users can update and access method services directly on
the CMS A-disk. as users receive the following messages: CREATING TEXT FILES ••• TEXT FILES CREATED ON DISK 'A'.
For both OS and DOS users, VSAMGEN then link-edits the VSAM modules
and places them in a CMS phase library called DOSLIB. At this
time you receive the following information messages: DMSVGN3621 LINK-EDITING CMSVSAM ••• DOSLIB CREATED ON DISK 'A'. Part 3. Generating Vft/370 (CP, RSCS, and IPCS) 273