Sharing the HDS Lightning 99xxV between a host and the SAN Volume Controller
There are restrictions for sharing an HDS Lightning 99xxV between a host and the SAN Volume Controller clustered system.
Sharing ports
The HDS Lightning 99xxV can be shared between a host and the SAN Volume Controller system under the following conditions:
- The same host cannot be connected to both the SAN Volume Controller system and an HDS Lightning at the same time because the Hitachi HiCommand Dynamic Link Manager (HDLM) and the subsystem device driver (SDD) cannot coexist.
- A controller port cannot be shared between a host and the SAN Volume Controller system. If a controller port is used by the SAN Volume Controller system, it must not be present in a switch zone that allows a host to access the port.
- Logical units (LUs) cannot be shared between a host and the SAN Volume Controller system.
Supported Topologies
You can connect the SAN Volume Controller system
to the HDS Lightning under the following conditions:
- For SAN Volume Controller software version 4.2.1 and later, you can connect a maximum of 16 HDS Lightning ports to the SAN Volume Controller system without any special zoning requirements.
- For SAN Volume Controller software
version 4.2.0, the following conditions apply:
- Logical Unit Size Expansion (LUSE) and Virtual LVI/LUN operations cannot be run on a disk that is managed by the SAN Volume Controller system. LUNs that are created by using LUSE and Virtual LVI/LUN can be mapped to the system after they are created.
- Only disks with open emulation can be mapped to the SAN Volume Controller system.
- IBM® disks cannot be used with the SAN Volume Controller system.
- Only Fibre Channel connections can connect the SAN Volume Controller system to the HDS Lightning.