Filter
Top Products
154 VM/HSC 6.0 System Programmer’s Guide
1st ed., 6/30/04 - 312579601
Volume Attribute Definition (VOLDEF) Command and Control Statement
The VOLDEF command and control statement is used to specify the definition data set
that contains volume attribute (VOLATTR) statements. (Refer to “Volume Attribute
(VOLATTR) Control Statement” on page 143 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 data set must contain one or more VOLATTR statements.
The VOLDEF statement can be specified in PARMLIB, or it can be issued as an operator
command to dynamically load or reload volume attribute parameters. (Refer to
‘‘PARMLIB Control Statements’’ in the HSC Installation Guide for an explanation of
PARMLIB.)
If a definition file is changed by a VOLDEF 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, VOLDEF can be used to temporarily change
a definition file.
Definition commands issued on one host are in effect only on that host. If different hosts
use the same definition data set, the volume attribute parameter statements are shared by
those hosts.
Notes:
1. StorageTek recommends that volume attributes be the same on all processors. This
can be assured by defining the same volume attribute definition data set to all hosts.
2. When the VOLDEF 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 VOLATTR control statement(s) will be loaded (put
into effect), which may cause the wrong scratch media to be mounted on a transport
or the wrong transport to be allocated for a volume. 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.
3. The VOLDEF command and control statement executes at both base and full service
levels of the HSC.
4. If you issue multiple VOLDEF statements, the last one processed is currently active.
You can determine which VOLDEF statement is active by entering the Display
VOLDEF command.
5. For additional information about syntax, refer to “Control Statement Syntax
Conventions” on page 439.
VOLDEF