This section lists entry points and sources of information for executing a Zero Downtime Option (ZDO) maintenance event.
The landing page for the Software Logistics Toolset (short: SL Toolset) in the SAP Support Portal is the central access for generic information on Software Update Manager as well as specific information on Zero Downtime Option: http://support.sap.com/sltoolset.
In the section, System Maintenance, the list of System Maintenance Scenarios has a comprehensive list of links that are relevant for Zero Downtime Option. The separate Support Portal page contains further information on how to get ZDO for SAP S/4HANA. In addition, the latest available SAP Notes on the approach will be linked there.
Main SAP Notes on ZDO
The documentation of ZDO is split into two main SAP Notes:
The starting point will be SAP Note 2707731 to check the latest prerequisites and restrictions like supported upgrade and update paths. From here, you can navigate further to the support package specific SAP Note.
Maintenance Strategy of SL Toolset and Software Update Manager
The maintenance strategy for the SL Toolset and especially for SUM is attached to the SAP Note for the actual SL Toolset. You find this SAP Note listed on the landing page of the SL Toolset in the Support Portal (http://support.sap.com/sltoolset). Moreover, you can check SAP Note 1563579 to get the information in the latest SL Toolset support package level.
For SUM 2.0, a new SP-version is typically made available three times a year as part of the SL Toolset. A SUM SP-version that is available for download is in phase in maintenance. When the successor SP-version is offered (version n+1), the previous version n transitions to phase patch on request. In this phase, the version is no longer available for download. In case of issues while using this version, customers can create an incident. If a fix is required, a patched version of that SUM version may be provided to this customer exclusively. When the next version (n+2) is made available, the version n transitions to phase out of maintenance. In this phase, fixes cannot be provided any longer.