Oracle Database 19c: ASM Administration Workshop — Lesson 3: Adding and Dropping Disks, Rebalance, Capacity, and Performance

Learning Objectives

• Explain the architecture, workflow, or business purpose behind disk add, drop, resize, replace, and online operations.
• Apply rebalance power, phases, estimates, and workload impact and usable capacity, required mirror free space, and imbalance in a controlled scenario.
• Validate outcomes and troubleshoot risks involving failure simulation, performance evidence, rollback, and change validation.

Detailed Topics

• disk add, drop, resize, replace, and online operations
• rebalance power, phases, estimates, and workload impact
• usable capacity, required mirror free space, and imbalance
• failure simulation, performance evidence, rollback, and change validation

Instructor Demonstration

Demonstrate disk add, drop, resize, replace, and online operations within an ASM storage estate expanded and rebalanced while protecting redundancy, performance, and database availability, then capture the exact configuration, command, transaction, report, model, query, code, or process evidence that proves the result for lesson 3.

Hands-On Exercise

Implement a controlled exercise covering rebalance power, phases, estimates, and workload impact and usable capacity, required mirror free space, and imbalance, then introduce and resolve an exception involving failure simulation, performance evidence, rollback, and change validation while preserving before-and-after evidence.

1. Confirm the environment, identities, inputs, dependencies, risks, and expected outcome.
2. Complete the course-specific configuration, development, analysis, or process workflow.
3. Capture settings, commands, data, outputs, logs, reports, screenshots, calculations, or test results.
4. Compare the observed result with acceptance criteria and document corrective action.

Scenario Analysis

• Identify the technical or business decision that must be made.
• Compare valid approaches and their security, performance, reliability, cost, compliance, and support trade-offs.
• Define rollback, recovery, ownership, communication, and evidence requirements.

Troubleshooting Guidance

Diagnose issues across disk add, drop, resize, replace, and online operations, rebalance power, phases, estimates, and workload impact, usable capacity, required mirror free space, and imbalance, failure simulation, performance evidence, rollback, and change validation without making an unverified production change. Separate symptoms from causes, gather evidence, test the smallest reversible correction, rerun validation, and record preventive action.

Validation Checklist

• The requirement, scope, inputs, dependencies, and expected result are documented.
• The result is reproducible and supported by course-specific evidence.
• Normal, boundary, failure, security, performance, and operational conditions are reviewed.
• Exceptions, rollback, ownership, and the next improvement priority are recorded.

Lesson Outcome

Learners can apply Adding and Dropping Disks, Rebalance, Capacity, and Performance in a realistic Oracle Database 19c: ASM Administration Workshop scenario and validate the result with documented evidence.