Rackable Systems OMNISTOR 4000f SERIES, User Manual

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Chapter 3 - Setup and Installation
Operating Mode Configuration and Cabling
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Operating Mode Configuration and Cabling
In this first section you will find the instructions for setting the SES Controller card
switches. Following that you will find illustrated instructions to setup and cabling the
specific operating mode topology.
SES Controller Card Switch Settings
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.
The SES Controller card switches set the device ID so they will always be the same. The
previous addressing method 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). Negotiated addressing occurs when a hard address or a previous
address does 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.
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.