What type of disks can be used as Shared Disks?

Question

AHAMEDSATHICK MOHAMEDALI · Accepted Answer

In Azure, the Shared Disk feature allows multiple virtual machines (VMs) to attach to the same disk at the same time (useful for clustering, failover scenarios, SQL FCI, SAP ASCS, etc.). But not all disk types support Shared Disks. ✅ Disk Types that can be used as Shared Disks in Azure 1. Premium SSDs (SSD-based, high performance) 2. Ultra Disks ❌ Disk Types that CANNOT be used as Shared Disks • Standard HDDs (basic, cost-optimized). • Standard SSDs (general-purpose SSDs). • Ephemeral OS Disks (temporary, VM-tied storage). 📌 Summary Table Disk Type Shared Disk Support Use Case Premium SSD ✅ Yes SQL FCI, clustering, high-performance apps Ultra Disk ✅ Yes Databases, SAP HANA, extreme performance Standard SSD ❌ No General purpose workloads Standard HDD ❌ No Backup, dev/test, infrequent access Ephemeral OS ❌ No Temporary OS disk only 👉 So, the only Azure Managed Disks that support Shared Disks are Premium SSDs and Ultra Disks.

What type of disks can be used as Shared Disks?

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