Why Hybrid Storage?
Not all enterprises can move completely to the cloud. Many still run on-premises applications that need fast local storage but also want the scalability and backup benefits of the cloud.
Azure provides hybrid storage solutions to bridge this gap: Azure File Sync and (historically) StorSimple.
Azure File Sync
Purpose: Extend on-premises file servers with Azure cloud storage.
Key Features:
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Syncs on-premises Windows Server file shares with Azure Files.
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Enables cloud tiering → frequently used files stay local, others offloaded to Azure.
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Centralized backups in Azure.
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Supports multi-site sync — branch offices can share the same cloud dataset.
Best Use Cases:
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Enterprises that want to modernize file servers without disrupting apps.
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Branch offices needing shared file access with central governance.
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Reducing on-prem storage costs by offloading inactive files.
StorSimple (Legacy)
Purpose: Hybrid storage appliance (now retired, exam may still reference it).
Key Features (historical):
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Automated data tiering between local SSDs/HDDs and Azure Storage.
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Integrated cloud backup.
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Reduced on-premises storage needs.
Status:
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End-of-life, replaced by Azure File Sync + Azure Blob Storage.
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If it appears in exam scenarios → usually expect “migrate to File Sync/Blob.”
Design Considerations for Hybrid Storage
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Performance
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Keep frequently accessed files on local cache for speed.
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Move less-used data to Azure cloud.
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Cost Optimization
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Reduce expensive SAN/NAS requirements on-premises.
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Pay only for used Azure storage capacity.
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Backup & Recovery
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Cloud copies provide disaster recovery.
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No need for separate tape/disk backups.
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Multi-Site Collaboration
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Branch offices can work on the same synced dataset.
Example Enterprise Scenario
A manufacturing company with factories worldwide:
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Needs local file access for CAD drawings.
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Rarely used older designs should not consume local storage.
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Global collaboration on shared documents.
Correct design:
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Use Azure File Sync for on-premises file servers.
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Enable cloud tiering so only active files remain local.
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Use Azure Files as centralized storage hub.
Confusion Buster
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Azure Files vs File Sync:
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Azure Files = managed SMB shares in the cloud.
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File Sync = extends on-prem file servers with cloud backend.
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File Sync vs StorSimple:
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File Sync = modern hybrid solution.
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StorSimple = legacy appliance, no longer supported.
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Exam Tips
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“Which service extends on-premises file servers to Azure?” → Azure File Sync.
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“Company wants to tier infrequently used files to the cloud while keeping hot data on-prem.” → File Sync with cloud tiering.
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“Which hybrid storage appliance is retired?” → StorSimple.
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“Company using StorSimple today wants modernization.” → Migrate to File Sync/Blob.
What to Expect in the Exam
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Direct Q: “Which Azure service supports syncing on-prem file servers with Azure Files?” → Azure File Sync.
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Scenario Q: “Company needs branch offices to share same dataset across sites.” → File Sync multi-site sync.
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Trick Q: “StorSimple is the recommended solution for hybrid storage.” → False (legacy, File Sync is correct).