You can use host mode options to improve response times when switches are used for distance connections.
Switches from some vendors (for example, McData ED5000) require F_port.
You can use the HMO 51 (Round Trip Set Up Option) host mode option (HMO) to improve response time of host I/O by improving response time between the storage systems when switches are used for distance connections (up to approximately 500 km with a round-trip response of 20 ms or less) and the open package is used.
For details about HMOs, see the Provisioning Guide for the storage system.
The fabric and topology settings depend on the settings of packages, and protocol used for the connection between storage systems, and the HMO 51 setting. The link speed that can be specified differs on each condition.
| Package name | Protocol | HMO 51 setting | Fabric setting | Topology: Initiator and RCU Target | Link speed that can be specified |
|---|---|---|---|---|---|
| CHB(FC32G) | 32GbpsFC | OFF | ON | Point-to-Point |
|
| CHB(FC32G) (VSP E series, VSP G/F350, G/F370, G/F700, G/F900) | 32GbpsFC | ON | ON | Point-to-Point |
|