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ATTO Technology Inc. FibreBridge Installation and Operation Manual
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.
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.
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.
A gender 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.
Device type
Cable
limit
Ultra SCSI Single Ended (SE) 1.5 meters
Ultra2 SCSI Low Voltage Differential
(LVD)
12 meters
Ultra160 SCSI Low Voltage Differential
(LVD)
12 meters
Ultra320 SCSI Low Voltage Differential
(LVD)
12 meters
Cable length Cable type Cable
size
FC
connector
Up to 175
meters
multi mode fiber
optic
62.5
micron
LC
Up to 500
meters
multimode fiber
optic
50
micron
LC
Up to 13
meters
unequalized
copper
HSSDC-2