Rackable Systems OmniStor 4900F Series, User Manual

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Chapter 1 - Getting Started
SFP Transceiver
14
The following table defines the function of each switch:
Each card contains Port Bypass Circuits (PBC) that allows for hot swapping, improved
signal quality and valid FC signal detection. An onboard Clock Recovery Units (CRU) is
provided to improve the signal quality, determine whether the input is a valid FC signal, and
amplification and jitter removal for optimum quality signals.
Cabling diagrams are provided in the Installation chapter for each supported topology. To
ensure proper connectivity, failover and failback operations, and LUN presentation, follow
the cabling diagram for your selected topology.
SFP Transceiver
The Host I/O and Disk I/O cards incorporate SFP cages which support optical
hot-swappable Small Form-Factor Pluggable (SFP) transceivers.
The optical SFP transceiver is Class 1 Laser safety compliant and conforms to Class 1 eye
safety standards.
CAUTION:
Do not look into the laser light beam for any extended period of time.
Switch Name Function
1 HOST SPEED Sets the FC Loop speed to 1 Gb or 2 Gb. An LED on the card
will illuminate to indicate 2 Gb mode. The “up” position sets 2
Gb mode and the “down” position will set the loop to 1 Gb
mode.
2 CTRL MODE Sets the enclosure for a specific controller model. This switch
must be set to the “up” position for the “Wahoo” Controller.
The “down” position is not applicable.
3 HUB FAILOVER This switch is not used.
4 HOST H0H1 LINK This switch when enabled, “up” position, provides the link
between the Host I/O card H0 and H1 ports. This switch
should be set to the “down” position when Switch 6 is enabled
(‘up’ position).
5 CTRL0 P0P1 LINK This switch is not used.
6 DUAL ACTIVE This switch is enabled (up position) when dual controllers are
installed. It is used to enable automatic internal hub failover
during a controller failure.
7 GND/VCC This switch is not used.
8 GND/VCC This switch is not used.