HP B6960-90078 manual 254

Backup

Pre- and Post-Exec Commands

✓The execution of pre- and post-execcommands is implemented using the Windows pipe mechanism. All processes started in the pre- or post-execfunctions must finish before processing continues.

✓A pre- or post-execcommand must return a non-negative value upon successful completion.

✓If a pre-execcommand fails (returns a value less than 0), the status of the backup session is set to Failed and the session is aborted.

✓If a post-execcommand fails (returns a value less than 0), the backup session status is set to Completed with errors.

✓The pre- and post-execcommands for a backup specification are by default NOT executed during a preview of the backup. This behavior is defined by the ExecScriptOnPreview variable in the global options file. See “Global Options File” on page 523 for details on how to modify these values.

✓Pre- and post-execcommands are handled in the same way as commands entered at the DOS prompt. Therefore, special characters, such as the pipe ( ) and the redirect symbols (>, <) are not allowed.

✓While pre- or post-execcommands are running, the backup session cannot be aborted.

✓The pre- and post-execcommands run in the background mode. Therefore, do not use any commands that require user interaction.

✓Standard output of the pre- and post-execcommands is written to the IDB as messages and shown on the monitor screen of the Data Protector GUI.

✓You can disable a session’s pre- and post-execcommand execution on the Cell Manager by setting SmDisableScript global option to 1.

✓You can disable remote session pre- and post-execcommand execution on any client by adding OB2REXECOFF=1 into the omnirc file on the specific client.

✓You can secure the client by specifying which Cell Managers are allowed to access the client. Only permitted Cell Managers will be able to execute pre- and post-execcommands on the client. For more information on securing a client, refer to the HP OpenView Storage Data Protector Installation and Licensing Guide.

254 Chapter 5