Oracle Database 19c: ASM Administration Workshop — Lesson 1: ASM Architecture, Instance, Disk Discovery, Disk Groups, and Redundancy

Learning Objectives

• Explain the architecture, workflow, or business purpose behind ASM instance, database clients, metadata, and allocation units.
• Apply disk discovery strings, candidate disks, headers, and ownership and external, normal, and high redundancy in a controlled scenario.
• Validate outcomes and troubleshoot risks involving failure groups, quorum awareness, compatibility attributes, and design evidence.

Detailed Topics

• ASM instance, database clients, metadata, and allocation units
• disk discovery strings, candidate disks, headers, and ownership
• external, normal, and high redundancy
• failure groups, quorum awareness, compatibility attributes, and design evidence

Instructor Demonstration

Demonstrate ASM instance, database clients, metadata, and allocation units 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 1.

Hands-On Exercise

Implement a controlled exercise covering disk discovery strings, candidate disks, headers, and ownership and external, normal, and high redundancy, then introduce and resolve an exception involving failure groups, quorum awareness, compatibility attributes, and design evidence 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 ASM instance, database clients, metadata, and allocation units, disk discovery strings, candidate disks, headers, and ownership, external, normal, and high redundancy, failure groups, quorum awareness, compatibility attributes, and design evidence 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 ASM Architecture, Instance, Disk Discovery, Disk Groups, and Redundancy in a realistic Oracle Database 19c: ASM Administration Workshop scenario and validate the result with documented evidence.