# Azure Storage Redundancy Options (LRS/GRS)

> Chapter 106 of the Courseiva AZ-900 curriculum — https://courseiva.com/learn/az-900/azure-storage-redundancy

**Official objective:** 2.4 — Azure Architecture Services

## Introduction

This chapter covers Azure storage redundancy options. AZ-900 tests under 2.4.

## Copies in Different Places

Important documents are copied and stored in different locations so one loss doesn't mean total loss. Storage redundancy works the same: data is copied across regions or zones.

## Core explanation

Redundancy ensures data isn't lost if a single location fails. LRS (local), ZRS (zone), GRS (geo) provide increasing resilience at higher cost.

## Real-world context

A company using GRS stores data in the primary region and automatically replicates to a paired region, surviving regional failures.

## Exam focus

Objective 2.4 expects understanding of redundancy options and tradeoffs.

## Step by step

1. **Choose redundancy level** — LRS, ZRS, GRS, or GZRS is selected based on resilience needs.
2. **Create storage** — A storage account with the chosen redundancy is created.
3. **Data replicates** — Data automatically replicates according to the redundancy setting.

## Key takeaways

- LRS: local redundancy only.
- GRS: regional failover.
- Higher redundancy = higher cost.

## FAQ

**What are storage redundancy options?**

LRS (local), ZRS (zone), GRS (geo) provide increasing resilience levels at higher cost.

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Interactive version with quiz and diagrams: https://courseiva.com/learn/az-900/azure-storage-redundancy