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

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

    Last Updated:Sep 11, 2026

    This topic explains how to migrate a mount target for a General-purpose NAS file system from the classic network to a VPC.

    Warning

    Starting November 21, 2022, Alibaba Cloud NAS no longer supports creating new mount targets in the classic network. Support for existing classic network mount targets will end on February 28, 2025. To prevent service disruptions, we strongly recommend that you migrate to VPC mount targets as soon as possible.

    Prerequisites

    The Elastic Compute Service (ECS) instance accessing the file system has been migrated from the classic network to a VPC. For instructions, see Migrate ECS instances from the classic network to a VPC.

    Migrate to a VPC mount target

    Important

    If both mount targets for your NAS file system are in the classic network, you can submit a ticket to request an increase to your mount target limit.

    1. Add a VPC mount target.

      Add a new VPC mount target and record the mount target address. For instructions, see Create a mount target.

    2. Unmount the file system that uses the classic network mount target. For instructions, see Unmount a file system.

      After you unmount the file system, log on to the NAS console. On the details page of the file system, go to the Mount Targets tab. Find the mount target and in the Actions column, click the image icon > Client List. Ensure that the Client List is empty. The client list shows clients active in the last minute. Inactive clients might not appear on this list, even if the file system is still mounted.

    3. Use the VPC mount target created in Step 1 to remount the file system to its original path. For instructions, see Mount a file system on an ECS instance.

    4. Disable the original classic network mount target. On the file system details page, go to the Mount Targets tab. In the Actions column for the original classic network mount target, click the image icon > Disable. Disable

    5. After confirming that your applications are running correctly, delete the original classic network mount target. On the Mount Targets tab, find the original classic network mount target, and in its Actions column, click the image icon >Delete.

    Find affected file systems

    • Using the console

      1. Log on to the NAS console.

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

      3. In the top menu bar, select the resource group and region for the file system.

      4. On the File System List page, find the target file system and click Mount in the Actions column. Check whether the Type is Classic Network.

    • Using an API

      Call the DescribeFileSystems API operation to query file systems in a region. You do not need to specify any request parameters. If the value of the NetworkType parameter in the response is classic, the mount target's network type is classic network.