Help Center/ Migration Center/ FAQs/ Risk Assessment/ How Do I Assess Server Migration Risks?
Updated on 2026-06-30 GMT+08:00
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How Do I Assess Server Migration Risks?

This section describes the check items and their required information for server migration risk assessment.

Figure 1 Server migration risk assessment

Table 1 Check items for server migration risk assessment

Check Item

Required Field

Check Purpose

ECS compatibility

OS image and type

Check the OS version compatibility with ECS to determine whether the server can be migrated to the cloud.

SMS compatibility

OS image, OS type, and firmware type

Check the OS version compatibility with SMS to determine whether the server can be migrated to the cloud.

Firmware type check

Firmware type

If the firmware type is UEFI, you need to prepare a UEFI image in advance.

Ultra-large Specifications

Number of CPUs

Determine whether the specifications are supported for cloud migration.

Special hardware

Hardware resource list

Check whether special hardware is used.

Scheduled tasks

Scheduled task list

Identify scheduled tasks on the server and assess migration risks in advance to prevent problems such as data inconsistency caused by scheduled task execution during the migration.

File share clients

Partition information

Check the partition information for shared storage, file share (CIFS/NFS/SMB) clients, and NAS clients.

Disk quantity

Disk information

The number of disks on a single VM cannot exceed 20.

Disk size

Disk information

The data disk size cannot exceed 24 TB, and the system disk size cannot exceed 1 TB.

Available partition space

Partition information and OS type
  • Linux: The available space of the root partition in the source system must be greater than 200 MB, and the available space of other partitions must be greater than 1 MB.
  • Windows: If the partition size is greater than 500 MB, the available space must be greater than 320 MB. If the partition size is less than or equal to 500 MB, the available space must be greater than 40 MB.

Partition file systems

Partition information and OS type
  • Linux: The file systems of all partitions on the source server must use Ext2, Ext3, Ext4, VFAT, or XFS. ReiserFS is not supported.
  • Windows: The file systems of all partitions on the source server must use NTFS. (For a UEFI system, only one reserved partition can use FAT32, and all other partitions must use NTFS.)
Parent Topic: Risk Assessment