StorageTek manual Voldef, 154VM/HSC 6.0 System Programmer’s Guide

VOLDEF

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.

154VM/HSC 6.0 System Programmer’s Guide

1st ed., 6/30/04 - 312579601