APPLIES TO:

Resolution

The following tables illustrate OS compatibility during Containers migration:

Windows 2003 Family

	Target
Source	W2K3 SP1	W2K3 SP2	W2K3 R2 SP1	W2K3 R2 SP2
W2K3 SP1	YES	YES	YES	YES
W2K3 SP2	NO	YES	NO	YES
W2K3 R2 SP1	NO	NO	YES	YES
W2K3 R2 SP2	NO	NO	NO	YES

Windows 2008 and Windows 2008 R2 Family

	Target
Source	W2K8 SP1	W2K8 SP2	W2K8 R2	W2K8 R2 SP1
W2K8 SP1	YES	NO	NO	NO
W2K8 SP2	NO	YES	NO	NO
W2K8 R2	NO	NO	YES	NO
W2K8 R2 SP1	NO	NO	NO	YES*

* Not all Windows 2008R2 SP1 editions and locales are supported by Parallels Virtuozzo Containers for Windows. For more information refer to this article:
113610 Windows 2008R2 SP1 locales and editions supported by Parallels Virtuozzo Containers for Windows

In addition to the tables above, keep in mind the following migration requirements:
- Architectures must be the same. Migration from x86 to x64 and vice versa is not supported.
- No migration is possible between Windows Server 2003 and Windows Server 2008.
- Host OS localization versions must be the same.
- Hosts must be the same product type, i.e., migration between Enterprise and Datacenter editions is not supported (The only exception is migration between Windows 2003 Standard and Enterprise editions, which is supported).
- For Windows 2008 and Windows 2008 R2, the source host and destination host must either both have Hyper-V enabled or neither have it enabled. If one of the hosts has Hyper-V enabled and the other does not, the migration will result in error.

NOTE: Migration via PMC is called with force flag, thus compatibility check for source and destination nodes is omitted.

NOTE: UPGRADE FROM WINDOWS 2008 TO WINDOWS 2008 R2 IS NOT SUPPORTED:
It is not possible to upgrade Windows 2008 to Windows 2008 SP1 or SP2.
It is not possible to upgrade Windows 2008 to Windows 2008 R2.
It is not possible to upgrade Windows 2008 R2 to Windows 2008 R2 SP1.