Hi,
To define a VSAM cluster in MVS 3.8 you need a volume
record in the catalog. This record will be created if you
define a data space or define a cluster with the keyword
UNIQUE.
If the volume record is created, that volume will be owned
by the catalog. You cannot define VSAM objects on that
volume located in another catalog.
In this case the keyword UNIQUE is the easiest way to
create the volume record in the catalog.
If UNIQUE is not specified, the default is SUBALLOCABLE.
For VSAM master catalogs and user catalogs no data space is needed.
To delete a volume record in the catalog and releasing
the volume ownership, you have to delete all the VSAM
objects from that volume.
Finally you execute a DELETE SPACE to delete the volume
record.
I hope, you can succeed this exercise.
Index components are much smaller than data components and require less space.
That is partially true unless you specify REPLICATE,
In that case each index record will be replicated over the
complete track to avoid massive SEARCH's (head movements).
Cheers,
Rob
Rob Prins