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This article describes how to expand managed disks for a Linux virtual machine (VM) with the Azure CLI. You can [add data disks](add-disk.md) to provide for additional storage space, and you can also expand an existing data disk. The default virtual hard disk size for the operating system (OS) is typically 30 GB on a Linux VM in Azure.
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> [!WARNING]
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> Always make sure that your filesystem is in a healthy state, your disk partition table type will support the new size, and ensure your data is backed up before you perform disk resize operations. For more information, see the [Azure Backup quickstart](../../backup/quick-backup-vm-portal.md).
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> Always make sure that your filesystem is in a healthy state, your disk partition table type will support the new size, and ensure your data is backed up before you perform disk expansion operations. For more information, see the [Azure Backup quickstart](../../backup/quick-backup-vm-portal.md).
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## Expand an Azure Managed Disk
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### Resize without downtime (preview)
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### Expand without downtime (preview)
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You can now resize your managed disks without deallocating your VM.
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You can now expand your managed disks without deallocating your VM.
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The preview for this has the following limitations:
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@@ -52,7 +52,7 @@ This article requires an existing VM in Azure with at least one data disk attach
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In the following samples, replace example parameter names such as *myResourceGroup* and *myVM* with your own values.
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> [!IMPORTANT]
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> If you've enabled **LiveResize** and your disk meets the requirements in [Resize without downtime (preview)](#resize-without-downtime-preview), you can skip step 1 and 3.
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> If you've enabled **LiveResize** and your disk meets the requirements in [Expand without downtime (preview)](#expand-without-downtime-preview), you can skip step 1 and 3.
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1. Operations on virtual hard disks can't be performed with the VM running. Deallocate your VM with [az vm deallocate](/cli/azure/vm#az-vm-deallocate). The following example deallocates the VM named *myVM* in the resource group named *myResourceGroup*:
@@ -21,15 +21,15 @@ When you create a new virtual machine (VM) in a resource group by deploying an i
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- To migrate a physical PC or VM from on-premises with a larger OS drive.
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> [!IMPORTANT]
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> Unless you use [Resize without downtime (preview)](#resize-without-downtime-preview), resizing a data disk requires the VM to be deallocated.
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> Unless you use [Expand without downtime (preview)](#expand-without-downtime-preview), resizing a data disk requires the VM to be deallocated.
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>
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> Shrinking an existing disk isn’t supported, and can potentially result in data loss.
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>
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> After expanding the disks, you need to [Expand the volume in the operating system](#expand-the-volume-in-the-operating-system) to take advantage of the larger disk.
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## Resize without downtime (preview)
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## Expand without downtime (preview)
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You can now resize your managed disks without deallocating your VM.
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You can now expand your managed disks without deallocating your VM.
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The preview for this has the following limitations:
> If you've enabled **LiveResize** and your disk meets the requirements in [Resize without downtime (preview)](#resize-without-downtime-preview), you can skip step 1. To resize a disk without downtime in the Azure portal, you must use the following link: [https://aka.ms/iaasexp/DiskLiveResize](https://aka.ms/iaasexp/DiskLiveResize)
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> If you've enabled **LiveResize** and your disk meets the requirements in [Expand without downtime (preview)](#expand-without-downtime-preview), you can skip step 1. To expand a disk without downtime in the Azure portal, you must use the following link: [https://aka.ms/iaasexp/DiskLiveResize](https://aka.ms/iaasexp/DiskLiveResize)
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1. In the [Azure portal](https://aka.ms/iaasexp/DiskLiveResize), go to the virtual machine in which you want to expand the disk. Select **Stop** to deallocate the VM.
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1. In the left menu under **Settings**, select **Disks**.
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:::image type="content" source="./media/expand-os-disk/select-disks.png" alt-text="Screenshot that shows the Disks option selected in the Settings section of the menu.":::
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1. Under **Disk name**, select the disk you want to resize.
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1. Under **Disk name**, select the disk you want to expand.
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:::image type="content" source="./media/expand-os-disk/disk-name.png" alt-text="Screenshot that shows the Disks pane with a disk name selected.":::
> If you've enabled **LiveResize** and your disk meets the requirements in [Resize without downtime (preview)](#resize-without-downtime-preview), you can skip step 4 and 6.
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> If you've enabled **LiveResize** and your disk meets the requirements in [expand without downtime (preview)](#expand-without-downtime-preview), you can skip step 4 and 6.
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