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Chapter 4: Subsystem Connection and Operation
Subsystem Connection and Operation 4-3
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.
4.2 Topology and Configuration
Considerations
4.2.1 Basic 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.