Ul. lOV 1- IV AB I, DY ,,!'NL GNL!)-Utsj I Updating CKS 3. If the new size exceeds your defined size, recode the NAMESYS macros to include an additional segment. Refer to the phase names
listed in step 1 to determine whether the segment is shared or
nonshared. To add one segment: • Increase the SYSPGCT operand by 16 • Increase the SYSPGNM operand by 16 • Increase the SYSHRSG operand by 1, if the segment is shared • Increase the SYSSIZE operand by 64K • Change the SYSSTRT operand of this or other segments, if the
increase in this segment causes any segments to overlap
4. Reassemble the DMKSNT module, build a new CP nucleus, and then
reexecute theVSAMGEN procedure.
If a PTF .contains a new VSAM or access method services module, it is nat included in or during VSAMGEN you have level of installation files.
If you want to use a new release level of DOS/VS, you must regenerate
the CMSVSAM and CMSAMS segments using the starter system supplied by DOS/VS. VM/370 provides new installation EXECs and DOSLNK files,
which vou must use to install the new release properly. The
installation procedure is described in Part 3. It is not necessary to regenerate existing Cl!SVSAM and CMSAMS segments using the Release 34 starter system. If you do so, however,
you must be sure that the space allocation for the CMSVSAM segment in
the system name table (D!'!KSNT) file is increased to five shared segments
and one nonshared segment, and the space allocation for the CMSAMS segment is increased to 6 shared segments and 2 nonshared segments.
Note that the segment addresses above these segments must be increased
accordingly. USING VSAMGEN TO UPDATE Cl!S VSAM AND ACCESS METHOD SERVICES Before you invoke VSAMGEN, do the following: • Access a read/write disk as your A-disk. This disk must be the
same disk that you used as your A-disk when you installed VSAM and
access method services. • If you are a DOS user, link to and access the DOS/VS system disk. • If you are applying PTFs from tape, a tape drive must be attached at
virtual address 181 and the PTF tape must be mounted and positioned
at the first tape file you want processed. VSAMGEN assumes that the PTF tape is unlabeled and contains 3440-byte blocks of records. Use the VSAMGEN EXEC procedure to update VSAM and Access Method Services support in CMS. Invoke VSAMGEN as follows:
vsamqen
358 IBM VM/370 Planning and System Generation Guide

Page of GC20-1801-10 As Updated April 1, 1981 by TNL GN25-0837 Updating CMS VSAMGEN prompts you to enter what type of user you are and whether you
plan to install or update VSAM and access method services. You receive
the following messages: DMSVGN360R ENTER EITHER 'INSTALL' OR 'UPDATE': DMSVGN361R ENTER EITHER 'DOS' OR 'OS': At this time, you should respond: UPDATE and either DOS or OS. If you
are both, respond liDOS." Part 5. Updatinq 358.1