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Chapter 3. HSC Control Statements and HSC Start Procedure 115
1st ed., 6/30/04 - 312579601
Scratch Subpool Definition (SCRPDEF) Command and Control Statement
The SCRPDEF command and control statement is used to specify the definition data set
that contains scratch subpool (SCRPOol) parameter statements. (Refer to “Scratch
Subpool Control Statement” on page 100 for details on syntax and parameters.) The data
set must be a sequential or a partitioned data set (PDS) with any valid record format
(RECFM). Also, the definition data set must contain one or more SCRPOol statements.
The SCRPDEF statement may be specified in the HSC PARMLIB, or it may be issued as
an operator command to dynamically load or reload scratch subpool parameters. (Refer to
“PARMLIB Control Statements” on page 83 for an explanation of PARMLIB.)
Warning:
1. If you reissue SCRPDEF, it resets subpool threshold values to 0. In this case, you
must reenter the subpool thresholds on the Warn command SUBpool parameter. Only
subpool thresholds are affected; ACS and LSM thresholds are not reset.
2. The SCRPDEF command does not refresh LibraryStation subpool(s) unless
LibraryStation is restarted using LS STOP and LS INIT.
If a definition file is changed by a SCRPDEF operator command, and if the change is to be
permanent, you must update PARMLIB before restarting the HSC. If the definition file is
to be modified for a given shift or application, remember that the new definition remains
in effect until another definition is loaded or the HSC is recycled. The definition file then
reverts to the PARMLIB specification. Thus, SCRPDEF can be used to temporarily
change a definition file.
Caution: If SCRPOol parameter statements are specified in PARMLIB, SCRPDEF is
disabled and dynamic scratch pool reload is not allowed.
Definition commands issued on one host are in effect only on that host. If different hosts
use the same definition data set, then the tape request parameter statements are shared by
those hosts.
Notes:
1. When the SCRPDEF command is issued, if the definition data set contains errors, an
HSC message provides the parameter in error, a description of the problem, and the
line number where the error occurred. If the definition data set contains errors, none
of the attributes specified in the SCRPOol control statement(s) will be loaded (put
into effect), which may cause data sets to be created on the wrong type of media and
incorrect devices to be allocated. Message SLS1627I is displayed if errors are
encountered. If 50 errors are encountered, the remainder of the data set is not
checked. Correct the problem and reissue the command.
2. The SCRPDEF command and control statement executes at both base and full
service levels of the HSC.
3. If you issue multiple SCRPDEF statements, the last one processed is currently active.
You can determine which SCRPDEF statement is active by entering the Display
SCRPDEF command.
SCRPDEF