Previously configured system 16.1.3 Considerations for I/O features If you are converting a system (configured and managed by using standard or traditional  tools) to the use of DPM, you must check the configuration of the system and verify whether  you must save any configuration data. This process helps you to decide whether you should  revert to “traditional” management tools. The following I/O and special purpose features are supported for configuration by using DPM: GLYPH<SM590000> OSA-Express features (all supported features) GLYPH<SM590000> FICON Express (all supported features): – Fibre Channel Protocol (SCSI) – FICON (ECKD) DASD GLYPH<SM590000> RoCE Express and RoCE Express2 features (as standard NIC, no SMC-R support) GLYPH<SM590000> IBM zEDC Express (used as an accelerator) GLYPH<SM590000> Crypto Express features (all supported features) GLYPH<SM590000> Coupling features$^{3}$: –I C A  S R – Coupling Express Long Reach GLYPH<SM590000> zHyperLink Express Important:  Not all channel types are supported for these features. For more information  about supported channel types, see the DPM documentation. The following features are  not  supported when DPM is used to configure and manage your  system: Important:  Always consult with operating system support for the features’ functionality  availability. From the available internal capabilities of the z14 ZR1, HiperSockets are supported and  configurable by using DPM. 4 If your environment requires time synchronization, the z14 ZR1 includes Server Time  Protocol (STP) support. STP support is provided through FC 1021.  STP allows the Z CPC to synchronize its time to an external time source (ETS). At Power On  Reset, the CPC retrieves the Time Of Day (TOD) from the SE. Further on, the time of the  CPC can be maintained in sync with an ETS by using the SE Network Time Protocol (NTP)  client (with STP configured) and STP feature. Internal features Time synchronization 3 InfiniBand coupling features are not supported on z14 ZR1. Although these features might be supported on  systems that support DPM, the InfiniBand features are  not  configurable or usable when the CPC is managed by  DPM. 4 Other internal features include Internal Shared Memory (ISM) communications that are used for SMC-D, Internal  Coupling (IC), and Virtual Flash Memory (VFM). These features are not supported in DPM mode. 390  IBM z14 Model ZR1 Configuration Setup