StorageTek Host Software Component 6 User Manual

1st ed., 6/30/04 - 312579601

This chapter discusses two kinds of control statements, PARMLIB (below) and definition 
data set (refer to

“Definition Data Set Control Statements” on page 103), and the HSC 

Start procedure (refer to “Starting HSC Execution” on page 163). For more information 
about HSC installation and initialization, refer to the HSC Installation Guide. 

Parameter library (PARMLIB) control statements provide you a way, at HSC 
initialization, to statically specify various operation parameters. Identifying your system 
needs and then specifying various control statements permits you to tailor the HSC to the 
needs of your data center. 

Some PARMLIB options can be altered after HSC initiation with the HSC running. These 
options can be changed using an appropriate operator command. With these options it is 
not necessary to stop the HSC and restart it to initialize the new or changed options that 
you want to specify. Those PARMLIB control statements that can be altered with the HSC 
running are identified as PARMLIB commands or control statements in this chapter. 

Any operator command can be specified as a PARMLIB control statement. 

Note: Refer to “Syntax Flow Diagrams” on page 429 for the rules and conventions that 
apply to command and control statement syntax. 

PARMLIB control statements are defined in a sequential data set or a single partitioned 
data set (PDS) member that is opened when the HSC is initialized. 

The PARMLIB control statements are invoked by specifying MEMBER(xx) or M(xx) on 
the /PARM statement in the startup job. The suffix ‘‘xx’’ is concatenated with SLSSYS to 
form a name. The name is used as the ddname in the startup job. The PARMLIB data set 
(or PDS member) is opened and read to obtain the parameters for running the HSC 
software. 

Note: It is strongly recommended to use shared data sets for PARMLIB control 
statements.