Merge pull request #277646 from roygara/examClar

Exam clar

Author: prmerger-automator[bot]

articles/virtual-machines/managed-disks-overview.md

@@ -4,7 +4,7 @@ description: Overview of Azure managed disks, which handle the storage accounts
 author: roygara
 ms.service: azure-disk-storage
 ms.topic: conceptual
-ms.date: 04/12/2024
+ms.date: 06/07/2024
 ms.author: rogarana
 ---
 # Introduction to Azure managed disks
@@ -90,6 +90,8 @@ Every virtual machine has one attached operating system disk. That OS disk has a
 
 This disk has a maximum capacity of 4,095 GiB. However, many operating systems are partitioned with [master boot record (MBR)](https://wikipedia.org/wiki/Master_boot_record) by default. MBR limits the usable size to 2 TiB. If you need more than 2 TiB, create and attach [data disks](#data-disk) and use them for data storage. If you need to store data on the OS disk and require the additional space, [convert it to GUID Partition Table](/windows-server/storage/disk-management/change-an-mbr-disk-into-a-gpt-disk) (GPT). To learn about the differences between MBR and GPT on Windows deployments, see [Windows and GPT FAQ](/windows-hardware/manufacture/desktop/windows-and-gpt-faq).
 
+On Azure Windows VMs, C: is your OS disk and is persistent storage, unless you're using [Ephemeral OS disks](ephemeral-os-disks.md).
+
 ### Data disk
 
 A data disk is a managed disk that's attached to a virtual machine to store application data, or other data you need to keep. Data disks are registered as SCSI drives and are labeled with a letter that you choose. The size of the virtual machine determines how many data disks you can attach to it and the type of storage you can use to host the disks.