Practical tools for system, network, security, and operations administrators.

DBA-C0072 · Backup & Recovery

Oracle RMAN Guide

Read an RMAN sketch. The delete of obsolete pieces stays a comment. Oracle RMAN Guide.

Updated 25 October 2026 · How-To

This is an original planning guide. It is not a vendor manual, an official standard, or legal advice. Example addresses use documentation ranges. Review every command before you paste it.

What this hour is for

The generator writes a backup of the database plus archivelog, a control-file backup, a commented DELETE NOPROMPT OBSOLETE, and a list of the backup summary. The delete stays commented until the retention policy is confirmed.

Do not uncomment the delete during the reading. Do not run the backup during the reading. The Oracle backup script on the same page is a draft, not a job you start from the browser.

192.0.2.10, 198.51.100.0/24, 203.0.113.0/24, and 2001:db8::/32 are documentation. example.com is a documentation name. A sample password is replaced. It is not a password you keep.

The change you can finish

Apply nothing while you are writing the note. When the lab window opens, it is one change on the database named in the ticket. Read the draft, then the database, then decide.

Rollback is the backup, the file, or the snapshot you saved first. You do not invent a rollback after the only copy is gone.

  1. Read the backup lines.
  2. Confirm the delete is still a comment.
  3. Name the database.
  4. Do not run it.
  5. Stop.

Mistakes that outlive the statement

Oracle RMAN Guide goes wrong in a small set of ways. The list is here so the ticket can forbid them before the window.

Decisions to write down

One decision for Oracle RMAN Guide: The delete is still a comment. The database is named. Nothing was run. And the instance is yours.

Checks before you call it done

Confirm this before you call the change done: The database is named. The delete is commented. Retention is written or still ahead. Nothing was run. And the instance is yours. If one of those fails, stop.

-- DELETE NOPROMPT OBSOLETE stays a comment.
-- Confirm retention before you remove backup pieces.
-- Do not run the backup during the reading.

Before you leave the database

Oracle RMAN Guide ends when the database in the prompt is the database in the ticket. If it is not, you are on the wrong database. Stop.

The draft stays a draft until a person has read the names in it. A generator does not log into the database. You delete a line that names a host, a database, or an account you did not write down.

192.0.2.10, 198.51.100.0/24, 203.0.113.0/24, and 2001:db8::/32 are documentation. example.com is a documentation name. They belong in the note. They are not values you leave on a database because a draft included them.

prompt-for-this is a reminder that a secret is missing. It is not a password, a key, or a token you save in the ticket or in git. A sample password in a draft is replaced. It is not a password you keep.

One change is the window. If two things move and the result is wrong, you will not know which one did it.

If the same step fails twice, stop for the day. Restore the copy you took first.

A second person reads the database name and the change aloud. If they cannot find them in the ticket, the note is not done.

This page is a planning guide. It is not a vendor manual, not an official standard, and not permission to touch a database you do not administer. You do not disable authentication, a firewall, or TLS to make a check pass.

Tools for this guide

These tools run in the browser on this site. They do not log into your machines.

More in this cluster

The pillar for this page, and the next published pages filed with it.