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There
are two important changes required to your VSE IPL ASI procedures when
performing a fast service upgrade (FSU) to z/VSE version 4 and later.
These changes are described in the z/VSE version 4 program directories
and in the z/VSE System Upgrade and Service manual, however if these
changes are missed, then you will have problems IPLing the z/VSE version
4 system during the FSU process.
z/VSE
version 4 only distributes one supervisor phase, $$A$SUPI. With z/VSE
version 4 the label area must be defined on a virtual disk since the
label area is no longer supported on a real disk. Both of these changes
can be implemented on your current VSE/ESA Version 2.7 (if migrating to
z/VSE Version 4.1) or z/VSE Version 3 system prior to migrating to z/VSE
Version 4.
If
your IPL procedure is currently using the $$A$SUPX supervisor, then you
can change the IPL procedure to use the $$A$SUPI supervisor which was
also shipped with VSE/ESA Version 2.7 and z/VSE Version 3. The $0JCL
procedure can also be updated on these releases to define the label area
on a virtual disk if you havent already done so and to remove the //
OPTION STDLABEL statement that loads the label area on the real disk
device defined with the DLA command in the IPL procedure.
The
following statements are typically at the beginning of the $0JCL
procedure to load standard labels into the label area on a real and
virtual disk:
// EXEC PROC=STDLABEL
LOAD LABEL AREA DISK (remove for z/VSE 4)
// VDISK UNIT=FDF,BLKS=2880,VOLID=VDIDLA,USAGE=DLA
// EXEC PROC=STDLABEL
LOAD LABEL AREA VDISK
The
VSE IPL procedure would also need a definition for the virtual disk used
in the above VDISK command if you do not already have the label area
implemented on a virtual disk. The following IPL command would be used
for this:
ADD FDF,FBAV
The
DLA statement in the IPL procedure will be ignored by z/VSE version 4
when it is IPLed and can be removed after the migration to version 4 is
completed. |