Question

Difficulty: EasyAzure Storage Accounts, Blob, Disk, Files, and Storage Tiers

An organization is deploying several Azure Virtual Machines (IaaS) and needs to select the appropriate storage solution for the operating system (OS) disks. Which Azure storage service is specifically designed for hosting virtual machine operating system disks?

  1. A
    The Archive access tier of Azure Blob Storage, which allows the virtual machine to read and write active operating system files directly.
  2. B
    Azure Files, with the expectation that Microsoft will manage the database engines and application middleware configurations inside the virtual machine.
  3. Azure Disk Storage, which provides persistent block-level volume storage for Azure Virtual Machines.Answer
  4. D
    Azure Files, with the expectation that the customer is responsible for patching the operating system of the servers hosting the file shares.

Answer

Azure Disk Storage, which provides persistent block-level volume storage for Azure Virtual Machines.
The correct answer is Azure Disk Storage because it provides block-level storage volumes designed to be attached to Azure Virtual Machines, which is required for hosting an operating system (OS) disk.

Step-by-Step Solution

1
Identify the workload requirement: hosting an operating system (OS) disk for an Azure Virtual Machine (IaaS).
The workload requires high-performance, persistent block-level storage that can be attached directly to a virtual machine.
An operating system disk requires low-latency read and write capabilities directly attached to the VM compute resource.
2
Evaluate the storage options based on the requirement.
Azure Disk Storage provides managed disks (block storage) specifically designed for VMs, while Azure Files is a shared file system (SMB/NFS) and Azure Blob Storage is object storage.
Only block storage (Disk Storage) can host the primary operating system virtual hard disk (VHD) for a virtual machine.

Key Concept

Azure Disk Storage is the block-level storage service designed for Azure Virtual Machines to run OS and data disks, whereas Azure Files provides file shares and Blob Storage offers object storage with different access tiers.
Estimated Time:45s
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