Figure 19-1 Overview of Supported Upgrade Paths
IMPORTANT: Cross-architecture Upgrades Are Not Supported
Cross-architecture upgrades, such as upgrading from a 32-bit version of SUSE Linux Enterprise Server to the 64-bit version, or upgrading from big endian to little endian are not supported!
Specifically, SLE 11 on POWER (big endian) to SLE 12 SP2 on POWER (new: little endian!), is not supported.
Also, since SUSE Linux Enterprise 12 is 64-bit only, upgrades from any 32-bit SUSE Linux Enterprise 11 systems to SUSE Linux Enterprise 12 and later are not supported.
To make a cross-architecture upgrade, you need to perform a new installation.
NOTE: Skipping Service Packs
The safest upgrade path is to go step by step and to consecutively install all Service Packs. In some cases it is supported to skip 1 or 2 Service Packs when upgrading. For details, see Supported Upgrade Paths per Version and Figure 19-1. However, we recommend to not skip any Service Pack.
NOTE: Upgrading to Major Releases
We recommend to do a fresh install when upgrading to a new Major Release, for example from SUSE Linux Enterprise 11 to SUSE Linux Enterprise 12.
There is no supported direct migration path to SUSE Linux Enterprise 12. We recommend a fresh installation in this case.
There is no supported direct migration path to SUSE Linux Enterprise 12. You need at least SLE 11 SP4 before you can proceed to SLE 12 SP4.
If you cannot do a fresh install, first upgrade your installed SLE 11 Service Pack to SLE 11 SP4. These steps are described in the Deployment Guide for SUSE Linux Enterprise 11: https://www.suse.com/documentation/sles11/ .
Upgrading from SLE 11 SP4 to SLE 12 SP4 is only supported via an offline upgrade. Refer to Section 20.0, Upgrading Offline for details.
A direct upgrade from SLE 12 GA to SP4 is not supported. Upgrade to SLE 12 SP2 or SP3 first.
A direct upgrade from SLE 12 SP1 to SP4 is not supported. Upgrade to SLE 12 SP2 or SP3 first.
Upgrading from SUSE Linux Enterprise 12 SP2 to SP4 is supported.
Upgrading from SUSE Linux Enterprise 12 SP3 to SP4 is supported.
Updating directly from SUSE Linux Enterprise 12 LTSS SP1 to SP4 is supported.