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1Fibre Channel is a key technology for storage
Fibre Channel is a serial communications technology designed to transfer large amounts of data
between a variety of hardware systems over long distances. It is a key technology for applications that
require shared, high bandwidth access to storage.
Fibre Channel provides a logical point-to point
serial channel for the transfer of data between a
buffer at a source device and a buffer at a
destination device. It moves buffer contents from
one port to another, without regard to the format
or meaning of the data, so different upper level
protocols are able to run over Fibre Channel
hardware.
The Fibre Channel architecture is structured as a
hierarchica l set of pro tocol laye rs. Def ined with in
these layers are rules for signal interfaces, serial
encoding and decoding, error control, frame
format and communications protocols.
All A TTOTM FibreBridgeTM models can be used in
A SAN is a shared storage architecture connecting
computers and storage devices for online data
access. Each connected system can directly access
any attached storage device. Storage devices
could include RA ID , ta pe ba c k up , tape libr a ry,
CD-ROM library or JBOD.
SANs maintain greater fault tolerance and load
balancing by supporting server clustering and
failover (the ability for one server to take over for
another in the event of a failure).
ATTO FibreBridge models provide the interface
between SCSI and Fibre Channel resources in
SANs. Possible configurations depend upon your
current hardware and what you need to do.
a SAN (Storage Area Network) to connect a
variety of Fibre Channel and SCSI devices to
meet your needs.
Glossary
Some terms used in the Fibre Channel industry are defined below . More information is available through
the F ibre C hannel Industry Assoc iation
Association
(www.snia.org)
and the Fibre Channel Consortium
(www.fibrechannel.com)
, the Storage Area Networking Industry
(www.iol.unh.edu)
.
TermDefinition
fabricA Fibre Channel s witch or two or m ore Fibre Channe l s witche s interconnec ted to
physically transmit data between any two N_Ports on a switch or switches.
failoverThe substitution of a working system for one which has failed.
FC-ALFibre Channel Arbitrated Loop: A Fibre Channel network in which up to 126
systems and devices are connected in a loop topology, with each transmitter
connecting to the receiver of the device to its logical right. The Fibre Channel
Arbitrated Loop protocol used for transmission is different from Fibre Channel
switche d and point to point prot ocols. Multiple FC-A L loops can be conn ected via
a fabric switch to extend the network.
firmwareSoftware stored in read-only memory (ROM) or programmable ROM (PROM).
Firmware is often resp onsible f or the beha vior of a sy stem when it is fi rst switc hed
on.
AT TO Technology FibreBridge 1190E Installation and Operation Manual
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TermDefinition
F_portA port in the Fibre Channel fabric where a N_port may attach
FL-portA port in the Fibre Channel fabric where a NL_port may attach in an arbitrated
loop
hot swappingComponents are removed and replaced while the unit is running, with power to
either the component or a device connected to the unit. Not all components are
hot swappable: please read installation and maintenance instructions carefully.
initiator deviceA component which originates a command
JBODJust a Bunch Of Disks: a storage subsystem using multiple independent disk
drives with or without RAID configuration.
LEDLight-emitting diode , a type of dio de that emits li ght when current pas ses through
it. Visible LEDs are used as indicator lights on all sorts of electronic devices.
LUNLogical Unit Number: a SCSI or Fibre Ch annel identifier of a device
NL porta port attached to a node in Fibre Channel arbitrated loop or fabric loop
configurations
N_porta port attached to a node used with point to point or fabric configurations
RAIDOriginally Redundant Array of Inexpensive Disks, now Redundant Array of
Independent Drives: a storage system spanning multiple disk drives.
The following standard RAID specifications will be used here:
Glossary
RAID 0: disk striping in which fixed-length sequences of data are mapped to
member disks in a regular rotating pattern.
RAID 1: Mirrored arr ays: inf ormation written to on e disk is a lso written to ano ther
simultaneously. Also known as disk shadowing, real-time copy, and t1 copy.
RAID 10: Striped array with mirroring
SCSISmall Computer Systems Interface: a processor-independent standard for
system-le v el interf ac e betw een a compute r and in telligent d e vices i ncluding hard
disks, floppy disks, CD-ROM, printers, scanners, etc.
topologylogical layout of the parts of a computer system or network and their
interconnections
2
2ATTO FibreBridge supports diverse SAN needs
The ATTO FibreBridge
TM
family of products provides a Fibre Channel-to-SCSI bridg e av ail ab le as a
embedded boa rd , a stand alone e nclosur e that c an be fitted for rac kmount int e gration, o r a desktop unit ,
depending on the model and your needs.
The ATTO FibreBridge family of products share
common configuration options and functions to
provide the most versatile connectivity options
available. Each product has been engineered to
address specific customer needs. New capabilities
are integrated into products throughout the
have the most up-to-date version of the firmware,
visit the ATTO Technology website,
www.attotech.com.
All A TTO FibreBridge models include full duplex
mode, Class 2 transfers, Intermix transfers and
direct fabric connect capabilities.
FibreBridge family as much as possible, requiring
only an upgrade of firmware to incorporate them
into your SAN (see Chapter 9). To make sure you
Please refer to the Technical Specifications for
complete information about your FibreBridge
model.
Quick start instructions for the FibreBridge 1190E
The ATTO FibreBridge 1190E offers a variety
of ways to connect into a SAN. The following is
a quick start description:
1Place the FibreBridge 1190E where you
want it. (See Chapter 3)
2Connect the SCSI devices to the
FibreBridge . (See Chap ter 4)
3Connect the FibreBridge to your SAN:
attach short wave optical cables into the
Fibre Channel port on the FibreBridge. (See
Chapter 5)
4Connect to the management (services) port
via the RS-232 serial port or Ethernet. (See
Chapter 7)
5Map your devices to the appropriate
FibreBridge Fibre Channel port. (See
Chapter 6 and Chapter 7.1.2)
6Boot the computers on the SAN and
configure the devices connected to the
FibreBridge.
AT TO Technology FibreBridge 1190E Installation and Operation Manual
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Exhibit 2-1The following chart provides an overview of the features and capabilities for the newest FibreBridge
models. Contact your authorized ATTO representative or visit ATTO Technology’s website, www.attotech.com, for
additional information.
Introduction
ATTO FibreBridgeTM feature availability matrix
1180E1190E2200R/D3200R4500C/R/D
FC Ports11113
FC port number
0
0000, 1, 2
(fp)
FC interfaceDB9/SC
DB9/SCGBICGBICSC
Data transfer1 Gigabit1 Gigabit1 Gigab it1 Gi gab it1 Gi gab it
SCSI ports1
SCSI bus number
1190E is a 1 x 2 (one Fibre Channel port with two SCSI ports) Fibre Channel
to SCSI bridge for high throughput enterprise environments designed for mission-critical applications.
The FibreBridge 1190E features a small form
factor for standard embedded applications such as
tape drives, hard disk drives and other SCSI
devices and includes serverless backup support
and support for manual and auto LUN mapping
Dimensions
4.2 inches wide
➔
SCSI ports
The two SCSI ports on the FibreBridge 1190E
connect storage devices into the Fibre Channel
Storage Area Network (SAN). Each port is totally
independent from the others.
The FibreBridge 1190E SCSI port is an Ultra 2
(LVD) SCSI with 80 MB/sec. maximum per bus,
downward compatible with all forms of single-
7.6 inches long
➔
Cooling
Environmental requirements
o
0-40
➔
➔
➔
C
Ambient air should not exceed 70oC.
10-90% humidity non-condensing
ended SCSI.
Exhibit 3-1Graphical representation of the
FibreBridge 1190E with ShortWave fiber optic SE
connector (top) or MIA compliant DB-9 connector
(bottom).
Power
Power (+5 V and +12V) is supplied to the
FibreBridge 1190E through a standard PCI
connector or a 4-pin connector, the default: Amp
Part no: 641737-1. The 1190E is designed to have
5% tolerance to the power supply. A switching
±
regulator generates 3.3V from either 5V or 2V,
requiring 0. 75 A at 1 2V. Jumper-e n abl e d power
from a PCI connector is also possible.
Fibre Channel port
The Fibre Channel port can connect the
FibreBridge to either a Fabric or Arbitrated Loop.
1.0625 gigahertz (100 MB/sec.)
➔
Class 2, Class 3 and Intermix ANSI Fibre
➔
Channel specifications support
PLDA, Public Loop Login (NL_port) and
➔
Fabric Direct Connect (N_port) support
Full Duplex transmission support
➔
MIA compliant DB-9 or Short Wave fiber
➔
optic SE connector
AT TO Technology FibreBridge 1190E Installation and Operation Manual
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Ethernet port
The 10/100 Base T Ethernet port supports SNMPand Telnet-based monitoring and management
through a command line interface or menu
system.
Serial port
The RS-232 serial port provides support for
remote monitoring and management through a
command line interface or menu system.
Serial/Ethernet RJ45 port
The RJ45 port may be used for either
serial or Ethernet connections depending
on the jumper settings and cable. The
factory sets the jumpers in a serial
configuration across the top and middle
rows of the selector header.
To enable an Ethernet configuration,
Serial/Ethernet
RJ45 port
selector head er
move all the jumpers in the selector
header to the middle and bottom rows.
Attach a standard Ethernet cable.
If using the RJ45 in a serial
PCI
Connector
configuration, create a serial cable
connection with the following pin outs:
(numbered 0). During very high activity,
the LED appears to be steadily lit.
SCSI Activity: shows activity on the SCSI
➔
bus (numbered 0).
Ready: should light after power has been
➔
applied; indicates the board has completed
the initialization process without any
failures and is ready to handle data
transfers.
Exhibit 3-2FibreBridge 1190E board layout.
Ethernet / Serial
Port Connector
Dual stacked
SCSI Connector
SCSl activity
LED
Fibre Channel
Connector
Fibre Channel
activity
and Ready/Faul t
LED
FibreBridge 1190E
Signal NameRJ45 Pin
TX1
RX2
Ground6
LED indicators
FC Activity: LED blinks to show
➔
activity on the Fibre Channel port
4 Pin Power
Connector
JTAG
Header
Reset
Jumper
RS232 Serial
port header
6
4How to connect SCSI devices to SCSI ports
ATTO FibreBridgeTM SCSI ports are used to connect SCSI storage devices into the Fibre Channel
Storage Area Network (SAN).
A FibreBridge may have the following types of
SCSI ports:
Ultra 2 (LVD) SCSI– 80 MB/sec. max per
➔
bus
Single Ended Ultra SCSI – 40 MB/sec.
➔
max per bus
A FibreBridge with an LVD SCSI personality
module is downward compatible with Single
Ended Ultra SCSI as well as Fast, Wide, or
Narrow SCSI devices.
Each SCSI port is totally independent from the
any other SCSI port. This means that each bus is
capable of supporting 15 devices and each bus is
capable of 40 or 80 MB/sec. (Ultra or Ultra2).
However, you may use externally provided
software striping to create a RAID 0 group that
includes devices from both SCSI busses to
increase overall performance.
Another advantage of independent SCSI ports is
that each 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, thus wasting the performance
capabilities of the faster devices. You should
connect slower devices to one SCSI port and
connect faster devices on the other port on your
FibreBridge.
The FibreBridg e su pp or ts a wide var iet y of SC SI
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:
onnect a VHDCI SCSI connector from the
1C
SCSI device to a port on the FibreBridge
1190.
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.
Device typeNumber of
devices
Ultra SCSI Single Ended
(SE)
Ultra SCSI Single Ended
(SE)
UltraSCSI High Voltage
Differential (HVD)
Ultra2 SCSI Low Voltage
Differential (LVD)
2Set the IDs of the SCSI devices connected to
the bridge to a value other than 7. It is
recommended to 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 slow est device. If you wish to mi x devices o f di fferent
SCSI speeds on the bridge, it i s best to place them on
separate busses. That is, put the slower devices on
bridge SCSI bus 0, and th e faster d evices on bridge SCSI
bus 1. Each bus is independent so each can operate at
different speeds.
less than 43 meters
4 or more1.5 meters
1525 meters
1512 meters
Cable limit
AT TO Technology FibreBridge 1190E Installation and Operation Manual
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3Terminate each SCSI bus after the last
device. The bridge is terminated internally.
5How to connect the Fibre Channel port
The Fibre Channel port(s) on the ATTO FibreBridgeTM connect the bridge into either a Fabric or
Arbitrated Loop.
Fibre Channel technology offers a variety of
cabling options including standard copper,
equalized copper, multimode
fiber optic, and single mode
fiber op ti c.
The FibreBridge 1190E uses
an MIA compliant DB-9 or
Cable lengthCable typeCable sizeConnector
<15 metersunequalized copperDB-9
≥
15 meters
≤
30 meters
Up to 175 metersmulti mode fiber optic62.5 micronSC optic connector
Up to 500 metersmulti mode fiber optic50 micronSC optic connector
equalized copperDB-9
Short Wave fiber optic SE connector.
The type of cable to use varies depending upon
the application, environment and distance. The
following tables illustrate the different cable
options available.
Make sure all cables are anchored securely at both
ends with the proper connectors.
Initial configuration
The FibreBridge can be configured to support
connectivity to arbitrated loop or fabric
topologies. (See Chapter 6 of this manual.)
When connecting these bridges to an F-Port
device, set the Port Connection Mode to “Pointto-Point.”
When connecting to a FL-port device, set
➔
the Port Connector Mode to “Loop” mode.
The FibreBridg e use s pu bl ic lo o p logi n to
➔
log into a FL-Port on a fabric switch.
The FibreBridge Port Connection Mode
➔
can be set using the RS-232, Ethernet, or
in-band com m u n ic at io n li nk s.
8
6ATTO FibreBridge addressing
The ATTO F ibreBridgeTM allows par allel SC SI dev ices to parti cipate in a F ibr e Chan nel arbitr ated loop
or on a fabric. Fibre Channel and parallel SCSI use different models to address devices. The FibreBridge
translates between these addressing models.
The chart below is a simplified overview of data
and control flow between the application and the
SCSI device through a number of stages.
Application
Operation
System
.
Host Bus
Adapter
PCP
(SCSI)
FibreBridge
SCSI bus
SCSI
device
Read & write da t a
SCSI LUN addressing in OS native form
Maps OS native LUNs
FCP_CMD: LUN plus CDB plus data
Parse Fibre port and Fibr e LUN into SCSI
BUS:Target:LUN
Transport SCSI address, CDB and data
to/from SCSI device
SCSI device operation
Fibre Channel World Wide Name (WWN)
Each Fibre Channel device is assigned a unique
W orld W ide Name (WWN). The WWN is used to
identify all Fibre Channel devices. The 64-bit
WWN has the following format:
Field
Name
Byte 01234 567
Value 2000001086 xxxx
WWN
Format
Company IDDevice ID
x
x
The Institute of Electrical and Electronics
Engineers (IEEE) assigns each manufacturer a
unique Company ID. The Device ID field
contains a unique value assigned by ATTO
Technology to every Fibre Channel product
produced by ATTO Technology.
Arbitrated Loop Port Address (AL_PA)
On a Fibre Chann e l Arbi t ra ted Lo op , th e
FibreBridge appears at a single Arbitrated Loop
Port Address (AL_P A ). Each device on an
arbitrated loop is assigned a unique AL_PA
during loop initialization. The FibreBridge
supports both modes of AL_PA assignment,
commonly referred to as
hard
and
soft addr essing
Soft addressing allows the loop initialization
master to assign the FibreBridge a unique AL_P A
during the loop initialization process. The AL_PA
assigned cannot be determined before loop
initialization. For example, adding new devices to
an arbitrated loop may change the AL_PA
assigned to the FibreBridge.
Hard addressing allows a predetermined AL_PA
to be assigned to the FibreBridge. The
FibreBridge will try to acquire the desired hard
AL_PA. If another device has already been
assigned the specified AL_PA, the FibreBridge
will acquire a currently unassigned AL_PA.
ATTO BridgeTools softwa re allows you to select
either hard or soft addressing modes. The default
mode is soft addressing .
Addressing Devices Connected to the
FibreBridge
SCSI devices connected to the FibreBridge also
show up as Fibre Channel LUNs to the host
computer. SCSI devices must be on the same
addressing level as the SCSI portion of the
.
AT TO Technology FibreBridge 1190E Installation and Operation Manual
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FibreBridge. The FibreBridge SCSI ports must be
set to different SCSI IDs than the devices on the
bus.
Y o u may map SCSI de vices manual ly by using the
Command Line Interface RouteXXX family of
commands. See Chapter 7.1.2 for more details.
ATTO FibreBridge addressing
SCSI devices are mapped manually to desired
Fibre Channel port and Fibre Channel LUNs.
Manual mapping allows you to maximize the
efficiency and performance of your SCSI devices
while allowing great flexibility .
Manual SCSI Device Mapping
The FibreBridge can be commanded to find all the
SCSI devices on its SCSI bus. With this
informat io n yo u th e n de c id e whe r e yo u want to
place these devices on the Fibre Channel ports.
In the chart at right, the SCSI device on SCSI bus
0 at SCSI address of I D 0 LUN 0 is being mapped
to Fibre Port 0 (on the Fibr eBr id g e) at Fibre
Channel LUN 4.