Operating Mode Configuration And Cabling - Fujitsu IRF-1S series User Manual

Chapter 3 - Setup and Installation
Operating Mode Configuration and Cabling
In this section you will find the instructions for setting the SES Controller card
switches and Host I/O card switches, followed by illustrated instructions to setup
and cabling the specific operating mode topology.
SES Controller Card Switch Setting Overview
A word about Fibre Channel device IDs. Under the FC protocol, device IDs can
be generated in several ways: hard addressing, previous addressing, and
negotiated addressing. RAID controllers prefer hard device addressing which
ensures that the device ID will always be the same. It is set using a specific set of
switch settings. Previous addressing is a method that allows the system to
determine whether or not the device has had a previous address ID assigned to it
and will attempt to use that ID, if it is not available it will assign a new ID. And
negotiated addressing occurs when a hard address or a previous address do not
exist and it will then negotiate the bus for a new device ID. The disadvantage of
negotiated device IDs is that there is a potential liability of the device ID
changing due to reconfiguration and therefore could cause potential problems for
the RAID controller's array drive members.
The SES Controller card has a set of switches which configures the enclosure
base address and assigns a device ID to the drive slots, and sets the drive spin-up
options. The disk drive slot IDs are determined by the first three switches,
labeled AD0, AD1, and AD2. They establish a base enclosure hard address and
assign the drive slots each with a pre-determined set of IDs.
Switches 4, 5 and 6 are spares, and switches 7 and 8 set the drive spin-up
options.
The table on the following page displays the available device ID ranges for each
series of switch settings. Following the diagram, is an illustration which depicts
the drive slot layout within the enclosure.
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Operating Mode Configuration and Cabling