Constraints

Table 1 lists the constraints and limitations on source servers for using SMS.

**Table 1** Constraints and limitations on source servers
Item	Description
Source server quantity	A user can migrate a maximum of 1,000 source servers concurrently. Delete the migrated servers from the server list in a timely manner so that other servers can continue to be migrated.
OS	The Windows OSs supported by SMS are all listed in Supported Windows OSs. The Linux OSs supported by SMS are all listed in Supported Linux OSs. A server running multiple OSs cannot be migrated.
Available disk space	Windows: At least 320 MB available space on a partition not smaller than 600 MB At least 40 MB available space on a partition smaller than 600 MB Linux: At least 200 MB of available space on the root partition
File system	Windows: Only NTFS partitions are supported. Linux: Only ext2, ext3, ext4, VFAT, XFS, and Btrfs file systems are supported.
Shared file system	SMS does not support the migration of files from shared file systems such as NFS or CIFS, or from NAS devices.
Encrypted file	OSs that contain protected folders and encrypted volumes cannot be migrated.
Servers that run multi-node databases and Active Directory Domain Services (AD DS)	SMS cannot migrate servers that host active directories or multi-node databases.
Applications bound to hardware	SMS does not support the migration of OSs that contain applications bound to hardware.
Dynamic disk	In Windows, dynamic disks are migrated as basic disks. After the migration is complete, the target server will not have dynamic disks.
Servers added to a domain	If you want to migrate a server added to a domain, after the migration is complete, the target server must be added to that domain.
External storage of servers	External storage attached to a source server cannot be migrated.
Data of database applications and domain controller applications	SMS cannot migrate data of active directories, database applications, and domain controller applications.
Servers with system volumes not on the first disks	SMS does not support the migration of servers whose system volumes are not on the first disks.
Thin-provisioning volumes tagged with pool in LVM	SMS does not support migration of thin volumes tagged with pool.
Servers with RAID arrays	SMS does not support migration of servers with RAID arrays.
GPU servers	SMS does not support the migration of GPU servers.