321 Studios GHDX2-2430S-24F4D manual Topology and Configuration Considerations

Chapter 4: Subsystem Connection and Operation

NOTE:

LC connectors are small form-factor, fiber-optic connectors based on a 1.25-mm ceramic ferrule with the familiar latching mechanism of the RJ- 45 modular plug and jack.

Other beneficial features of a typical SFP transceiver include a single power supply, low power dissipation, and hot-swap capability. It is also important that any transceiver you use meets the FC performance and reliability specifications.

NOTE:

SFP transceiver modules must be purchased separately. You may also purchase the SFP transceivers from your Galaxy subsystem vendor/distributor.

4.2Topology and Configuration Considerations

4.2.1Basic Configuration Rules

When you are configuring your subsystem, the following are some basic rules that should be followed.

•When selecting the number of hard drives to be included in a logical configuration, the host channel bandwidth and the mechanical performance of individual disk disks should be considered.

It is a good practice to calculate performance against the host port bandwidth when designing an application topology. As shown below, if eight (8) members are included in a logical drive, this logical drive should be associated with a host ID, and accessed through a host channel making efficient use of the channel bandwidth. If, for example, two 8-drive logical arrays are associated with IDs residing on a single host channel, there may be a trade-off with the best performance.

Subsystem Connection and Operation 4-3