The following restrictions apply when you configure the system by using NVMe over Fibre Channel (NVMe-oF) for the connection between hosts and the storage system. For details about NVMe-oF, see the Provisioning Guide for Open Systems.
VSP 5000 series with DKCMAIN 90-09-21-xx/xx or later supports three data center (3DC) configuration using a volume connected to a host via NVMe-oF. The following 3DC configurations with TC and UR are supported:
- 3DC cascade configurations
- 3DC multi-target configurations
- 3DC delta resync configurations
The supported DKCMAIN microcode versions must be used on all storage systems in the three sites. If the DKCMAIN microcode version on any of the storage systems in the three sites is not the supported version, the following operations might fail:
- TC pair operation
- UR pair operation
- Delta resync UR pair operation
If the operation fails, see the troubleshooting section for corrective actions.