Understand the storage model

Modern Backup Storage changes how MABS allocates and manages backup storage. Review the storage layout and capacity before changing protection groups.

Plan capacity before migration

Estimate current protected data, retention requirements, growth and free space. A storage migration should be planned around the actual recovery-point footprint.

Move protection carefully

Microsoft documents moving workloads by stopping protection while retaining data and then adding the data sources to a new protection group using Modern Backup Storage. Confirm the impact on existing recovery points before proceeding.

Validate after the change

Check replica and recovery-point status, disk utilization and scheduled jobs. Do not remove retained data until you have confirmed that the required recovery points remain available.

Document the storage layout

Keep a current map of MABS storage, protected workloads, retention policies and free capacity. This makes future capacity expansion and recovery troubleshooting much faster.

Useful commands

Get-DPMDiskStorage
Get-DPMProtectionGroup
Production checklist: capture the original state, test one dependency at a time, make the smallest controlled change and validate the original symptom before closing the incident.

What good troubleshooting looks like

Use evidence before configuration changes. Record the symptom, test result, change made and validation result so another engineer can repeat the procedure.

Workflow
Symptom → hypothesis → direct test → controlled change → validation → documentation

Frequently asked questions

What should I check first?

Start with the exact failed path or dependency and test it directly before changing configuration.

Should I change production configuration immediately?

No. Capture the current state first and make one controlled change at a time.

How should I document the fix?

Record the symptom, commands, result, configuration change and validation result.

Related TechRunbook guides

MABS Database Backup and Restore: DPMDB Recovery Runbook →MABS System State and BMR Backup Troubleshooting →MABS Protection Limitations: What to Check Before Adding a Workload →

Primary reference

This guide was independently written for TechRunbook. Technical details were checked against current Microsoft documentation. Microsoft Learn reference →

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