Server Migration Service
Server Migration Service

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      • What's New
      • Function Overview
      • Service Overview
        • What Is SMS?
        • SMS Advantages
        • SMS Functions
        • Billing
        • Permissions
        • Precautions
        • Notes and Constraints
        • Supported OSs
          • Supported Windows OSs
          • Supported Linux OSs
        • Disclaimer
        • Service Statement
        • Related Services
      • Getting Started
        • Before You Start
        • Migration Process
        • Preparing for Migration
        • Installing the Agent on the Source Server
          • Installing the Agent on Windows
          • Installing the Agent on Linux
        • (Optional) Creating a Migration Template
        • (Optional) Creating a Server Template
        • Configuring the Target Server
        • Starting a Full Replication
        • Launching the Target Server
        • Synchronizing Incremental Data
      • User Guide
        • Permissions Management
          • Creating a User and Assigning Permissions
          • SMS Custom Policies
        • Installing the Agent on the Source Server
          • Installing the Agent on Windows
          • Installing the Agent on Linux
        • Migration Management
          • Configuring a Target Server
          • Starting a Full Replication
          • Synchronizing Incremental Data
          • Setting a Migration Rate
          • Deleting a Migration Task
          • Uploading Migration Logs
          • Deleting Resources
        • Target Server Management
          • (Optional) Cloning a Target Server
          • Launching a Target Server
          • Viewing the Details of a Server
          • Deleting a Target Server Configuration
          • (Optional) Deleting a Server Clone
          • Unlocking a Target Server
          • Deleting an EVS Snapshot
        • Template Management
          • Managing a Migration Template
          • Managing a Server Template
        • Viewing CTS Traces
          • SMS Operations Supported by CTS
          • Viewing CTS Traces in the Trace List
          • Viewing Traces
      • Best Practices
        • Moving Huawei Cloud ECSs from Multiple Accounts to a Single Account
        • Migrating Physical or Virtual Servers On-Premises or in Other Clouds to Huawei Cloud
        • Migrating the System and Data Partitions of a Windows Server to the Separate Disks of a Huawei Cloud ECS
        • Migrating a Server into an Enterprise Project
          • Background
          • Enabling EPS and Creating an Enterprise Project
          • Authorizing the User Group to Manage the Enterprise Project
          • Migrating the Source Server
          • FAQ
            • How Do I Fix Error "SMS.0204 Insufficient permissions" When the Migration Fails?
            • How Do I Fix Error "Enterprise project not enabled" When I Start the Agent?
        • Migrating Servers Whose OSs Are Not Supported by SMS
          • Background
          • Migrating Servers Running Unsupported Linux OSs
          • Migrating Servers Running Unsupported Windows OSs
        • Customizing Agent Images
          • Using Custom Agent Images
          • Creating Scripts in Agent Images
          • Creating a Windows Agent Image
          • Creating a Linux Agent Image
        • Migrating Servers over an IPv6 Network
          • Preparing for Migration
          • Setting Up an IPv6 Network and Creating a Target Server
          • Creating a Migration Task
        • Change History
      • API Reference
        • Before You Start
        • API Overview
        • Calling APIs
          • Making an API Request
          • Authentication
          • Response
        • Application Examples
          • Creating a Migration Task
          • Starting a Migration Task
          • Pausing and Deleting a Migration Task
        • APIs V3.0
          • API Version Query
            • Listing API Versions
            • Querying an API Version
          • Agent Running
            • Obtaining the Agent Configuration Information
          • Source Server Management
            • Listing Failed Source Servers
            • Registering a Source Server with SMS
            • Listing Source Servers
            • Batch Deleting Source Server Records
            • Modifying a Source Server Name
            • Updating the Migration Task Status of a Source Server
            • Deleting a Source Server Record
            • Querying Details About a Source Server
            • Obtaining Source Server Overview
            • Updating Disk Information
          • Task Management
            • Creating a Migration Task
            • Listing Migration Tasks
            • Batch Deleting Migration Tasks
            • Deleting a Migration Task
            • Querying Details About a Migration Task
            • Updating a Migration Task
            • Managing Migration Tasks
            • Reporting Migration Progress and Rate
            • Querying the Migration Rate Limit Rules of a Migration Task
            • Setting Migration Rate Limit Rules for a Migration Task
            • Unlocking a Target Server
            • Checking NICs and Security Groups
            • Querying a Certificate Passphrase
            • Uploading Migration Task Logs
            • Obtaining Consistency Verification Results
            • Uploading Consistency Verification Results
          • Command Management
            • Obtaining Commands from SMS
            • Reporting the Command Execution Result to SMS
          • Template Management
            • Creating a Template
            • Listing Templates
            • Batch Deleting Templates
            • Deleting a Template
            • Querying Details About a Template
            • Modifying a Template
            • Querying the Target Server Password in a Template
          • Key Management
            • Obtaining an SSL Certificate and Private Key
            • Calculating an SHA256 Hash
          • Migration Project Management
            • Creating a Migration Project
            • Listing Migration Projects
            • Querying Details About a Migration Project
            • Deleting a Migration Project
            • Modifying a Migration Project
            • Changing the Default Migration Project
          • Network Measurement Management
            • Updating Network Measurement Information
          • Advanced Migration Options Management
            • Configuring Advanced Migration Options
            • Querying the Settings of Advanced Migration Options of a Task
          • Privacy Agreement Management
            • Signing the Privacy Agreement
            • Querying Whether a User Has Signed the Privacy Agreement
        • Appendix
          • Error Codes
          • Status Codes
          • Obtaining a Project ID
        • Change History
      • SDK Reference
        • SDK Overview
      • FAQs
        • Question Summary
        • Product Consultation
          1. Can I Migrate ECSs from Huawei Cloud to On-Premises Environments or Other Clouds Using SMS?
          2. Can I Ask Huawei Cloud Technical Support to Help Me Migrate Services?
          3. Does SMS Support Resumable Data Transfer?
          4. How Do I Migrate an ECS from One Account to Another?
          5. How Do I Migrate an ECS from One Region to Another Using SMS?
          6. How Do I Migrate a Linux Source Server as a Non-root User?
          7. How Do I Create an ECS?
          8. What Is Block-Level Migration?
          9. What are Valid Data Blocks?
          10. How Does Migration Using SMS Differ from Migration Using IMS?
          11. Why Is the OS Name of the Target ECS Displayed on the ECS Console Different from That of the Source Server?
          12. How Do I Determine Whether a Migration Is Complete?
          13. How Does SMS Differ from IMS in the Migration Scenario?
          14. What Are the Snapshots of a Target Server Used for?
          15. How Many Source Resources Will Be Used for a Linux Block-Level Migration?
          16. Do I Need to Activate the Windows OS and Paid Software After the Migration Is Complete?
          17. Which Directories Are Not Synchronized by Default During Incremental Synchronization on a Linux Server?
          18. Why Can't the Create new Option Be Selected When I Configure a Migration Task for a Windows Source Server?
        • Billing
          1. Billing
        • OS Compatibility and Migration Restrictions
          1. What Are the Constraints on and What OSs Are Supported by SMS?
          2. What Are the Important Statements of SMS?
          3. How Many Servers Can I Migrate Concurrently Using SMS?
          4. How Do I Check the Firmware Type of a Source Server?
          5. Why Do I Need to Install Additional Components Before Migrating Amazon Linux 2023?
          6. What Should I Consider and Prepare Before Migrating a Server Running Red Hat Enterprise Linux CoreOS?
        • Source Servers
          1. Can I Migrate Servers from Other Clouds to Huawei Cloud?
          2. Will My Services on the Source Server Be Interrupted During Migration?
          3. What Information Does SMS Collect About Source Servers?
          4. Can I Migrate Only Some Workloads from a Source Server?
          5. Can I Migrate a Source Server If There Is No Corresponding Image Available on Huawei Cloud?
          6. Can I Use SMS to Migrate Self-built Databases, Big Data Services, or Websites Deployed on a Source Server?
          7. Will the Migration Be Affected If the SSH Service Does Not Use Default Port on the Source Server?
        • Agent Installation and Startup
          1. How Do I Download the SMS-Agent for Windows and the SHA256 Verification File?
          2. How Do I Download and Install the Agent on Source Servers?
          3. What Can I Do If I Fail to Download the Agent Installation File?
          4. How Do I Verify the Integrity of the Agent Installation File?
          5. Why Wasn't My Source Server Added to the SMS Console After I Configured the Agent?
          6. How Do I Configure Certificate Verification in the SMS-Agent Configuration File?
          7. Where Can I Find the Agent Run Logs?
          8. How Do I Resolve Error "SMS.5109 The application cannot be started due to incorrect parallel configuration" When I Start the Agent?
          9. Why Does the Agent Not Start the First Time I Launch It?
          10. Why Does the Windows Agent Executable Not Run When I Double-Click It?
          11. How Do I Fix Error "INTERNAL ERROR: cannot create temporary directory!" When I Start the Agent?
          12. How Do I Troubleshoot Failures of Pasting the AK/SK Pair When I Start the SMS-Agent (Python 2) on Windows Server 2008?
          13. How Do I Resolve Error "utf-8 codec can't decode byte 0xce in position0: invalid continuation byte" When I Start the Agent?
          14. How Do I Restart the Agent?
          15. How Do I Fix Agent Startup Failures Due to Insufficient Space in /tmp on a Linux Source Server?
          16. How Do I Fix Error "Failed to start sms agent! disks" When I Start the Agent on a Linux Source Server?
          17. How Do I Fix Error "Failed to obtain information about disk %s" When I Start the Agent on a Linux Source Server?
          18. How Do I Choose When the System Asks Whether to Disable the Google Services Detected on My Source Server on Google Cloud?
          19. What Do I Do If a Source Server's Name I Modified on the SMS Console Is Overwritten After the SMS-Agent Is Restarted?
        • Target Server Consultation
          1. What ECS Types Are Supported by SMS?
          2. What Are the Differences Between Target and Source Servers After the Migration?
          3. What Determines the Specifications of a Target Server?
          4. How Will the Authentication of a Target Server Change After the Migration?
          5. Why Is the File System Size Inconsistent Before and After the Migration?
          6. Will an Incremental Synchronization Overwrite Existing Data on a Launched Target Server?
          7. How Do I Create a Target Server That Meets the SMS Requirements?
          8. Why Can't I See Data Disks on a Windows Target Server After the Migration Is Complete?
          9. Why Are the Agent Plug-ins from the Source Cloud Service Provider Retained on the Target Server After the Migration Is Complete?
          10. After the Migration Is Complete, Will Deleting the Target Server Configuration or Server Record Affect the Source or Target Server?
          11. If I Change the Password of the Source Server and Perform an Incremental Synchronization After the Full Migration Is Complete, Will the New Password Be Synchronized to the Target Server?
          12. Why Is My Target Server Locked During the Migration?
          13. How Do I Unlock a Target Server Manually?
        • Target Server Configuration
          1. How Do I Select a Target Server?
          2. How Do I Configure Data Compression for a Linux Block-Level Migration?
          3. How Do I Limit Resource Allocation for the Agent in a Linux Migration?
          4. How Do I Set the Number of Concurrent Processes for a Linux File-Level Migration?
          5. How Do I Configure the Yum Repository for the Target Server After the Migration Is Complete?
          6. How Do I Fix Error "SMS.0601 ECS creation failed?"
          7. Why Can't I Save the Migration Configuration as a Template?
          8. How Do I Resolve Error "Inconsistent firmware type. Source: UEFI, Target: BIOS" When I Create a Migration Task?
        • Target Server Launch
          1. How Do I Optimize a Windows Target Server After the Migration Is Complete?
          2. After a Windows Server Is Migrated, Why Is the Used Space of C: Drive Increased?
          3. How Do I Uninstall the SMS-Agent from the Source and Target Servers After the Migration Is Complete?
          4. Why Can't a Windows Target Server Access the Internet After the Migration Is Complete?
          5. Why Is the System Recovery Options Window Displayed When the Target Server Is Started?
          6. How Do I Fix a GRUB Error Because an XFS Volume Is Mounted to the /boot Partition?
          7. How Do I Troubleshoot a MySQL Startup Failure on the Target Server After the Migration?
          8. How Do I Resolve Error "SELinux targeted" When I Start a Linux Target Server After the Migration Is Complete?
          9. Why Is the Usable Memory (RAM) Less Than the Total Installed Memory on a Target Server Running 64-bit Windows?
          10. How Do I Fix BSOD Errors When I Start a Windows Target Server After the Migration?
          11. How Do I Fix Startup Failures of a Windows Target Server After the Migration?
          12. What Configuration Items Do I Need to Modify for the Target Server After the Migration Is Complete?
        • Data Consistency
          1. Can the Target Server Run a Different Type of OS from the Source Server?
          2. How Do I Verify Data Consistency Between the Source and Target Servers?
          3. How Do I Display the OS Name of a Target Server on the ECS Console?
          4. Why Is Consistency Verification Not Supported for Red Hat Enterprise Linux CoreOS?
        • Credentials
          1. How Do I Obtain an AK/SK Pair for a Huawei Cloud Account?
          2. How Do I Obtain an AK/SK Pair for an IAM User?
          3. Can I Use an AK/SK Pair of a Federated User (Virtual IAM User) for Authentication During the SMS-Agent Startup?
          4. How Do I Obtain the SMS Domain Name Required for Starting the SMS-Agent?
          5. Can I Use a Temporary AK/SK Pair for Migration?
        • Migration Network
          1. How Do I Set Up a Secure Migration Network for Using SMS?
          2. What Are the Network Requirements for Existing Target Servers?
          3. How Do I Configure Security Group Rules for Target Servers?
          4. How Do I Restore the Connection Between the Agent and SMS?
          5. Why the Migration Progress Is Suspended or Slow?
          6. Does a Source Server Have to Connect to the Internet?
          7. How Do I Configure a Source Server to Access Huawei Cloud Through a Proxy?
          8. Can I Release or Change the Target Server EIP During the Migration?
          9. How Do I Measure the Network Performance Before the Migration?
          10. Can I Set a Rate Limit for a Migration?
          11. How Do I Configure Automatic Recovery?
        • Migration Duration
          1. How Long Does a Migration Take?
          2. How Do I View the Remaining Migration Time?
          3. How Is the Migration Rate Displayed on the SMS Console Calculated?
          4. How Do I Speed Up Migration?
          5. Why Does the Migration Speed Fluctuate?
          6. How Do I Test the Network Bandwidth Between the Source and Target Servers Using iPerf?
          7. Why Isn't the Increased Bandwidth Being Used During the Migration?
          8. Is the Migration Speed Determined by the Source Bandwidth or the Target Bandwidth?
          9. Why Does the Migration Stay at a Stage for a Long Time?
          10. What Factors Affect the Migration Speed?
          11. Why Is the Linux Block-Level Migration Very Slow?
        • Disk Management
          1. Why Was a 40-GB EVS Disk Added to the Target Server During the Migration?
          2. Why Can't I Attach the Original System Disk Back to a Target Server?
          3. How Do I Resize Partitions and Disks When I Migrate a Windows Source Server?
          4. How Do I Shrink the Disk Partitions on a Windows Source Server?
          5. How Do I Exclude a Partition from Migration in Windows?
          6. How Do I Resolve Error "Target server has fewer disks than source server. Select another target server" When I Configure the Target Server?
          7. What Are the Disk Requirements for Source and Target Servers?
          8. How Can I Migrate a Source Server with a Large System Disk?
          9. How Do I Resolve Error "Some disks on the target server are smaller than those on the source server. Select another target server" When I Configure the Target Server?
          10. Can SMS Migrate Local Disks on a Source Server?
          11. When I Migrate a Windows Source Server from Alibaba Cloud, Why Do I Need to Choose a Target Disk at Least 1 GB Larger than the Paired GPT Source Disk?
          12. Why Can't I Specify Whether to Migrate a Physical Volume When I Resize Disk Partitions in Linux?
          13. Why Can't I Specify Whether to Migrate a Logical Volume When I Resize Disk Partitions in Linux?
          14. What Are the Rules for Resizing Volume Groups, Disks, and Partitions?
          15. How Do I Migrate a Server with a System Disk Larger Than 1 TB?
          16. How Do I Manually Detach the Temporary System Disk from My Target Server and Re-attach the Original System Disk?
          17. Why Is the Amount of Migrated Data Less Than the Total Amount of Data to Be Migrated After the Migration Is Complete?
          18. How Do I Split a Disk During a Linux Migration?
          19. How Do I Detach the Temporary System Disk from My Target Server and Re-attach the Original System Disk using SMS-Agent?
          20. What Do I Do If Some Disks Are Not Attached to the Target Server After the Migration Is Complete?
        • Migration or Synchronization Failures
          1. After the Migration Is Complete, How Do I Replicate Any New Data from the Source Server to the Target Server?
          2. What Do I Do If the SMS-Agent Exits Suddenly and Disconnects a Windows Source Server from the SMS Console During a Migration?
        • Known Errors and Solutions
          1. SMS.0202 AK/SK Authentication Failed. Ensure that the AK and SK Are Correct
          2. SMS.0203 Connection from Source Server to API Gateway Timed Out
          3. SMS.0204 Insufficient Permissions. Obtain the Required Fine-Grained Permissions
          4. SMS.0205 Incorrect System Time or Time Zone On Source Server
          5. SMS.0206 Only x86 Servers Can Be Migrated
          6. SMS.0208 Failed to Send Your Service Statement Confirmation to SMS
          7. SMS.0210 Failed to Create File on Target Server
          8. SMS.0212 Agent Restarted
          9. SMS.0219 Failed to Obtain Temporary Credential from Configuration File
          10. SMS.0303 Unable to Access Domain Name
          11. SMS.0304 SSL/TLS Authentication Failed
          12. SMS.0410 Failed to Obtain NIC Information
          13. SMS.0412 Target Server Does Not Exist
          14. SMS.0515 Migration Failed. Source Disk Information Has Changed. Delete Target Server Configuration and Restart the Agent
          15. SMS.0609 An Older Version of Agent Is Detected. Please Exit The Current Program, Uninstall the Old Agent Completely, and Install the Newest One
          16. SMS.0805 Failed to Migrate Partition to Target Server
          17. SMS.0806 Failed to Synchronize Partition to Target Server
          18. SMS.0807 Network Error Between Source and Target Servers
          19. SMS.1104 Failed to Detach disk xx
          20. SMS.1113 Failed to Reconfigure Partition Details on the Target Server
          21. SMS.1105 Disk Creation Failed
          22. SMS.1106 Failed to Delete Disk XX
          23. SMS.1204 Failed to Create File on Source Server
          24. SMS.1205 Failed to Load WMI
          25. SMS.1351: Mount Point /xxx Detected on the Source Server, Which Has No Free Space. Ensure that There Is at Least 1 MB of Space
          26. SMS.1352: Unknown Physical Volumes Detected on the Source Server
          27. SMS.1353: Bind Mount or Repeated Mount Detected on /xxx of the Source Server
          28. SMS.1402 SSH Client Not Installed
          29. SMS.1414 The Migration Module Stopped Abnormally and Cannot Synchronize Data
          30. SMS.1807 Failed to Connect to the Target Server. Check Whether Its IP Address Is Reachable and Confirm that Port 8900 Is Enabled
          31. SMS.1901 Agent Could Not Read Disk Information
          32. SMS.1902 Failed to Start the I/O Monitoring Module
          33. SMS.1904 Failed to Create a Snapshot for the Windows Server
          34. SMS.2802 Failed to Connect to the Target Server. Check Whether Its IP Address Is Reachable and Port 8899 Is Enabled
          35. SMS.3102 Failed to Modify the initrd File on the Target Server
          36. SMS.3205 Failed to Mount Partition XXX to Directory XXX
          37. SMS.3802 Failed to Establish an SSH Connection with the Target Server
          38. SMS.3803 The Connection to the Port 22 of Target Server Failed, Because an Error Occurred During the Public Key Verification on the Target Server
          39. SMS.3804 The Connection to the Port 22 of Target Server Failed Due to Invalid Connection Credential
          40. SMS.3805 The Connection to the Port 22 of Target Server Timed Out
          41. SMS.3806 The Connection to the Port 22 of Target Server Was Rejected
          42. SMS.5102 Agent Startup Failed Because the noexec Permission Is Unavailable on /tmp in Linux
          43. SMS.5105 Agent Startup Failed. Insufficient Permissions to Add Files to or Delete Files from xxx
          44. SMS.5108 Failed to Execute df -TH
          45. SMS.5112: Agent Main Program linuxmain Could Not Run
          46. SMS.5113 Check %s on Linux Timed Out
          47. SMS.6303 The Installed Agent Is of an Earlier Version. Download the Latest Version
          48. SMS.6509 Incompatible File System of the Source Server
          49. SMS.6511 The Source Server Lacks Driver Files
          50. SMS.6517 rsync Not Installed on the Source Server
          51. SMS.6526 Insufficient Quota
          52. SMS.6528 Complete Real-name Authentication to Invoke SMS APIs
          53. SMS.6533 VSS Not Installed on the Source Server
          54. SMS.6537 SMS Cannot Migrate System Disks Larger Than 1 TB
          55. SMS.6564 Component i386-pc Not Found on Source Server. For solution, see SMS API Reference
          56. SMS.6563 File initrd or initramfs of the xxxx Version Not Found Under /boot Directory. For solution, see SMS API Reference
          57. SMS.6616 The Current OS Does Not Support Block-level Migration/SMS.6617 The Current Kernel Version Does Not Support Block-level Migration
          58. SMS.9007 Migration Task Paused. Rate Limit Not Applied. Rate Exceeded Limit Multiple Times