ATTO Technology 2400C/R/D Appendix A Cabling, SCSI port connections, Fibre Channel connections

Appendix A Cabling

ATTO FibreBridge SCSI ports connect SCSI storage devices into the Fibre Channel Storage Area Network (SAN). Use an Ethernet connection to use the ATTO ExpressNAV interface.

Make sure all cables are anchored securely at both ends with the proper connectors.

SCSI port connections

The FibreBridge supports a wide variety of SCSI storage devices including stand-alone drives, removable drives, JBODs, tape, CD and DVD drives, changers, libraries and magneto optical drives.

Each SCSI port is totally independent from the other SCSI port. Each bus may support up to 15 devices and each SCSI bus auto-negotiates the appropriate sync rates with the connected devices. If slower devices are mixed with faster devices, the bus communicates at the rate of the slowest device.

Connect slower devices to one SCSI port and faster devices to the other port.

Connect a SCSI connector from the SCSI device to a SCSI port on the FibreBridge.

Check the type of cable, cable length limit and number of devices recommended for each port. Keep cable lengths as short as possible to ensure the highest signal quality and performance. These cable lengths include the wiring inside the devices.

Device type	Cable
	limit
Ultra SCSI Single Ended (SE)	1.5 meters
Ultra2 SCSI Low Voltage Differential	12 meters
(LVD)
Ultra160 SCSI Low Voltage Differential	12 meters
(LVD)
Ultra320 SCSI Low Voltage Differential	12 meters
(LVD)

Fibre Channel connections

Fibre Channel technology offers a variety of cabling options. The type of cable required varies depending upon the application, environment and distance.

Cable length	Cable type	Cable	FC
		size	connector
Up to 175	multi mode fiber	62.5	LC
meters	optic	micron
Up to 500	multimode fiber	50	LC
meters	optic	micron
Up to 13	unequalized		HSSDC-2
meters	copper

Serial port connections

The ATTO FibreBridge supports remote service operations over the RS-232 serial port using standard terminal emulation software available with most systems.

Connect a DB-9 crossover serial cable (null modem) between the ATTO FibreBridge serial port and one of the computer's serial COM ports.

Agender changer or DB-9 to DB-25 converter may be needed depending on the cables being used.

Ethernet connections

The 10/100 BaseT Ethernet port provides remote monitoring and management using the ATTO ExpressNAV interface.

When you connect an Ethernet cable between the FibreBridge and a 10/100Base-T connection, you may need a crossover cable connecting directly to a computer. The ATTO FibreBridge auto detects the Ethernet speed by default.

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ATTO Technology Inc. FibreBridge Installation and Operation Manual