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Oracle® Secure Backup Reference
Release 10.1

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4 obtar

This chapter describes obtar, which is the underlying Oracle Secure Backup engine for backing up and restoring data. obtar is a descendent of the original Berkeley UNIX tar(1) command. The obtar command-line interface conforms to the POSIX 1003.2 standards for UNIX command lines as follows:

The command-line interfaces differ from the POSIX 1003.2 standards in that you cannot use a filename that begins with a dash as the argument to an option. For example, obtar returns an error if you attempt to specify -c ./-myfile.

Table 4-1 explains the basic obtar modes. The description of each mode includes the most common options. "obtar Options" describes additional options.

Table 4-1 obtar Modes

Option Description

obtar -c

Creates a one-time backup image of the directories and files specified on the command line.

obtar -g

Creates backup images for the directories and files specified in a backup description file (BDF). The syntax for BDFs is described in "Backup Description File Syntax".

obtar -x

Restores directories and files.

obtar -t

Lists the contents for a backup image.

obtar -z

Displays a backup image or volume label on the volume in the specified drive.

obtar -zz

Displays a list of the backup images contained on the volume.

obtar -Xlabel

Writes a volume label to the tape contained in the specified drive.

obtar -Xunlabel

Removes the volume label from the tape contained in the specified drive.

obtar -Xreuse

Marks the volume contained in the specified drive as being reusable.

See Also:

Oracle Secure Backup Administrator's Guide to learn how to use obtar