Before you can activate an SMS configuration, allocate the SMS
control data sets and define their contents. Control data sets are
virtual storage access method (VSAM) linear data sets that contain:
- Base configuration information
- SMS class, aggregate group, copy pool, optical library, tape library,
optical drive, and storage group definitions
- ACS routines
You can allocate control data sets with access method services
or TSO/E commands. You can define and alter the contents of control
data sets using ISMF. SMS uses three types of control data sets: a source control data set (SCDS), an active
control data set (ACDS), and a communications
data set (COMMDS).
Restrictions: Do not name any of your
SMS control data sets the single word ACTIVE. SMS uses the single
word ACTIVE as a reserved word indicating the active configuration
residing in the SMS address space. Naming an SMS control data set
'ACTIVE' results in errors.
Do not allocate control data sets as
extended format VSAM linear data sets.