Communication errors may occur if an Active Transceiver is installed after the host computer has completed starting up.
Solution
At system startup, the Fibre Channel card determines which transceiver is connected. If there is no module connected, it defaults to Passive Transceiver. If an Active Transceiver is connected after the server starts up, the amplitude is too high for the transceiver, which can result in communication errors with the Fibre Channel devices. Follow these steps to avoid this issue.
Proper Installation of the Active Transceiver
2. Install the Apple Fibre Channel PCI card.
3. Install the Active SFP Transceiver module into one of the SFP ports on the Fibre Channel card.
4. Turn on the host computer.