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    File Storage NAS:Switch a File Storage NAS instance from a classic network mount target to a VPC mount target

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    File Storage NAS:Switch a File Storage NAS instance from a classic network mount target to a VPC mount target

    Last Updated:Dec 01, 2025

    This topic describes how to replace a mount target in the classic network with a mount target in a virtual private cloud (VPC) for a File Storage NAS (NAS) file system.

    Warning

    On and after November 21, 2022, NAS no longer lets you create mount targets in the classic network. Classic network mount targets will be disabled and will no longer be maintained from February 28, 2025. To prevent impacts on your business, we recommend that you replace classic network mount targets with VPC mount targets at your earliest opportunity.

    Prerequisites

    Elastic Compute Service (ECS) instances that are deployed in the classic network are migrated to a VPC. For more information, see Migrate ECS instances from the classic network to a VPC.

    Replace classic network mount targets with VPC mount targets

    Important

    If your file system has two mount targets and both are classic network mount targets, submit a ticket to increase the number of mount targets.

    1. Add a VPC mount target.

      Add a VPC mount target and record the domain name of the mount target. For more information, see Create a mount target.

    2. Unmount the file system that was mounted using the classic network mount target. For more information, see Unmount a file system in the NAS console.

      After the uninstallation is complete, log on to the NAS console. On the details page for the destination file system, click the Mount Targets tab. Find the mount target. In the Actions column, choose the image icon > Client List and verify that the Client List is empty. The client list displays clients that have used NAS within the past minute. Some clients that are mounted but not in use may not be displayed in this list.

    3. Use the VPC mount target created in Step 1 to remount the file system to the original destination path. For more information, see Mount NAS file systems on ECS instances.

    4. Disable the original classic network mount target. On the Mount Targets tab of the destination file system details page, find the mount target and in the Actions column, choose the image icon > Disable.

    5. After you confirm that your services are not affected, delete the original classic network mount target. On the details page of the destination file system, go to the Mount Targets tab. Find the original classic network mount target and in the Actions column, choose the image icon > Delete.

    Query affected NAS file systems

    • Use the console

      1. Log on to the NAS console.

      2. In the navigation pane on the left, choose File System > File System List.

      3. In the top menu bar, select the resource group and region where the file system is located.

      4. On the File System List page, click Mount in the Actions column for the destination file system. Verify that the network type of the mount target is Classic Network.

    • Call API operations

      Call the DescribeFileSystems operation to query the file system information in a specified region without specifying request parameters. If the value of the response parameter NetworkType is classic, the network type of the mount target is Classic Network.