HP OpenVMS 8.x manual Preparing an Alternate System Disk

E.6 Alternative Backup and Restore Procedure (Minimum OpenVMS Environment)

This section describes an alternative method of performing backup and restore operations. This method is similar to creating a Standalone Backup directory on a disk, as supported by OpenVMS VAX systems and certain earlier versions of OpenVMS Alpha (using SYS$UPDATE.STABACKIT.COM). This method installs a Minimum OpenVMS Environment (install with no options) on another disk from which you can perform your backup and restore operations on the system disk. The Minimum OpenVMS Environment is created in the SYSE root ([SYSE]) on the disk, which runs a subset of OpenVMS and is indicated by the triple dollar sign ($$$) system prompt. Use this method under the following conditions:

•If you do not have access to the operating system media and its menu system

•If you want to back up a shadowed system disk without disabling the shadow set

NOTE: You can back up your running system disk by using the /IGNORE=INTERLOCK qualifier with the BACKUP command and ignoring warning messages. However, that method requires that all other use of the system be suspended, including disabling logins, stopping print and batch queues, and turning off networking software. In addition, you cannot use this method to restore files to the running system disk. Because of these limitations, HP recommends that, if you must use an alternative backup or restore method, you use the method described in this section.

E.6.1 Preparing an Alternate System Disk

Prepare an alternate system disk as follows:

1.Log in to a privileged account on your running OpenVMS system.

2.Using the SHOW DEVICE command, identify a data disk on which you can install the operating system, with no options. This is your target disk during that installation. To install the operating system with no options on your target disk, you need the following amount of free disk space:

• Approximately 4,748,000 blocks (2.4GB)

Existing data remains on the disk.

3.The target disk must be mounted privately to your process. (This prevents other users from accessing this disk during the installation and backup procedures.) Therefore, if the target disk was mounted with the /SYSTEM, /CLUSTER, /GROUP, or /SHARE qualifier, dismount that disk and mount it without those qualifiers or the /FOREIGN qualifier. For example:

$ MOUNT/OVERRIDE=IDENTIFICATION DKA200

4.Enter the following command:

$ @SYS$SYSTEM:I64VMS$PCSI_INSTALL_MIN.COM [target-disk]

(The procedure prompts you for a device name if you do not specify it on the command line.)

E.6 Alternative Backup and Restore Procedure (Minimum OpenVMS Environment) 251