Switch zoning for Hitachi HUS VM systems
Switch zoning configurations for the Hitachi HUS VM system include fabric zoning, target port sharing, host splitting, and controller splitting.
The Hitachi HUS VM system has no zoning limitations. However, as the Hitachi HUS VM system can virtualize storage itself, it must be zoned separately from other storage that IBM Spectrum Virtualize™ can detect to prevent issues with IBM Spectrum Virtualize LUNs.
The Hitachi HUS VM systems present themselves by default to the IBM Spectrum Virtualize system as separate controllers for each port that is zoned to the IBM Spectrum Virtualize system. For example, if one of these storage systems has four ports that are zoned to the IBM Spectrum Virtualize system, each port appears as a separate controller rather than one controller with four WWPNs. A given logical unit (LU) must be mapped to the IBM Spectrum Virtualize system through all controller ports that are zoned to the IBM Spectrum Virtualize system by using the same logical unit number (LUN).
Fabric zoning
When you zone a Hitachi HUS VM storage system to the IBM Spectrum Virtualize backend ports, be sure to have multiple zones or multiple Hitachi HUS VM storage system and IBM Spectrum Virtualize ports per zone to enable multipathing.
Target port sharing
The Hitachi HUS VM storage system can support LUN masking to enable multiple servers to access separate LUNs through a common controller port. In this setup, there are no issues with mixing workloads or server types.
Host splitting
To prevent multipathing driver incompatibility issues, avoid connecting a host to both the IBM Spectrum Virtualize system and a Hitachi HUS VM system at the same time.
Controller splitting
Performance issues might be caused by splitting controllers. Ideally, configure so that the IBM Spectrum Virtualize system has exclusive access to the controller. Hitachi HUS VM storage system LUNs that are mapped to the IBM Spectrum Virtualize system cannot be mapped to other hosts. LUNs that are not presented to the IBM Spectrum Virtualize system can be mapped to other hosts.