Specifications

7
ATTO Technology FibreBridge 1180E/D Installation and Operation Manual
4 How to connect SCSI devices to the SCSI port
ATTO FibreBridge SCSI ports connect SCSI storage devices into the Fibre Channel Storage Area
Network (SAN).
The FibreBridge 1180E/D has an Ultra 2 (LVD)
SCSI bus downward compatible with Single
Ended Ultra SCSI as well as Fast, Wide, or
Narrow SCSI devices.
The SCSI port can support 15 devices. The SCSI
bus is capable of 40 or 80 MB/sec. (Ultra or
Ultra2).
The SCSI bus auto-negotiates the appropriate
sync rates with the connected devices. If slower
devices are mixed with faster Ultra2 devices, the
bus will communicate at the rate of the slowest
device.
The FibreBridge supports a wide variety of SCSI
storage devices including stand-alone drives,
removable drives, JBODs, RAIDs, tape, CD and
DVD drives, changers, libraries and magneto
optical drives.
To connect SCSI devices to the ATTO
FibreBridge:
1C
onnect a 68-pin
P
SCSI connector from the
SCSI device to the SCSI port on the
FibreBridge 1180E/D.
Check the type of cable, cable length limit and
number of devices recommended for each port. It is
important to keep cable lengths as short as possible
to ensure the highest signal quality and
performance.These cable lengths include the wiring
inside the devices.
Set the IDs of the SCSI devices connected to the
bridge to a value other than 7. Use a sequential ID
starting at 0 for each device. Each SCSI port in the
ATTO FibreBridge has an internal factory setting
ID of 7, typical for a SCSI initiator device.
NOTE
The entire SCSI bus will operate at the speed of
the slowest device.
2 Terminate each SCSI bus after the last
device. The bridge is terminated internally.
Device type Number of
devices
Cable limit
Ultra SCSI Single Ended
(SE)
less than 4 3 meters
Ultra SCSI Single Ended
(SE)
4 or more 1.5 meters
Ultra2 SCSI Low Voltage
Differential (LVD)
15 12 meters