ATTO Technology 2100R Fibre Channel Addressing, Scsi Address Components, Scsi Bus Identifier

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ATTO Technology, Inc.

ATTO FibreBridge Installation & Operation Manual

Fibre Channel Addressing

Fibre Channel World Wide Name (WWN)

Each Fibre Channel device is assigned a unique World Wide Name (WWN). The WWN is used to identify all Fibre Channel devices. The 64-bit WWN has the following format:

Field Name

WWN Format

 

Company ID

 

 

Device ID

 

 

 

 

 

 

Byte

0

1

2

3

4

5

6

 

7

Value

20

00

00

10

86

xx

xx

 

xx

The WWN Format field indicates the format of the remaining fields in the WorldWide Name.

The Institute of Electrical and Electronics Engineers (IEEE) assigns the Company ID field. All manufacturers of Fibre Channel equipment register with the IEEE to obtain a unique Company Identification value. The IEEE manages the Company ID assignment, guaranteeing that no two manufacturers will have the same Company ID.

The Device ID field contains a unique value assigned by ATTO Technology to every Fibre Channel product produced by ATTO Technology.

When combined, these three fields create a 64-bit value, which is used to uniquely identify every Fibre Channel device.

Arbitrated Loop Port Address (AL_PA)

On a Fibre Channel Arbitrated Loop, the FibreBridge appears at a single Arbitrated Loop Port Address (AL_PA). 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 Addressing.

Soft Addressing allows the loop initialization master to assign the FibreBridge a unique AL_PA during the loop initialization process. When Soft Addressing is in effect, the AL_PA assigned to the FibreBridge cannot be determined prior to 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 attempt 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 software gives the user the ability to select either Hard or Soft Addressing modes. The default mode is Soft Addressing.

SCSI Address Components

The SCSI devices connected to the FibreBridge are uniquely addressed by a three-part address.

SCSI Bus Identifier

The SCSI Bus Identifier indicates on which of the two FibreBridge SCSI bus ports the device resides.

ATTO Technology, Inc.

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Contents Atto Technology, Inc Atto FibreBridge Atto Technology, Inc Atto Fibrebridge Benefits and Features Updating the Firmware Within the Fibrebridge Atto Technology, Inc Introduction FibreBridge Product Module DescriptionFC Rack System Product Description Fibre Channel Technology ReferencesAtto FibreBridge Benefits and Features Fibre Channel Switch SupportAtto FibreChain Feature FibreBridge Feature ComparisonAtto FC Rack Enclosure and Power Modules Physical DimensionsMounting Environmental Cooling AirflowCooling Fans Internal Power Distribution Power ModuleLED Indicator IEC Power Receptacle and SwitchInstallation and Removal Atto FC Rack System Installation Considerations Power Requirements Atto FibreBridge Product Module IntegrationAtto FibreBridge Power Connector Fibre Channel Ports Scsi PortsLED Indicators FibreChain Ports 2100 model onlyAtto FibreChain Port LEDs 2100R model only Ethernet Port Serial PortFibreBridge 2200R/D FibreBridge2200R/D Front View2200R/D Side view with hole dimensions Power Supply Cooling and AirflowFibre Channel Port ScsiLED Indicators on FibreBridge 2200R/D Quick Installation Instructions Cabling a FibreBridgeScsi Cabling Typical Scsi Cables Scsi TerminationFibre Channel Cabling ConnectorConnector Laser Type Cable LengthGbic Installation Instructions Gbic Module and Gbic Guide SystemGbic Removal Instructions Media Interface Adapters MIAPin # Name MIA DB9 Connector MIA InstallationAccessing the Atto FibreBridge over the RS-232 interface FibreBridge ServicesAtto BridgeTools Graphical Interface Configuration Program Monitoring and Managing the Atto FibreBridgeAccessing the Atto FibreBridge over the Ethernet Port Setting up the IP Address using the RS-232 portAccessing through FTP Atto Technology, Inc Serverless Backup Support What is Serverless Backup?Target Descriptors General Operation of Serverless BackupEnabling Serverless Backup on the FibreBridge Segment DescriptorsUpdating the Firmware Within the FibreBridge Flashing the FibreBridgeAddressing Scsi Devices Identifying the FibreBridgeIdentifying the Scsi Devices Connected to the FibreBridge Default Address Translation Appendix a Fibre Channel to Scsi Address Mapping Addressing Devices Connected to the FibreBridgeFibre Channel World Wide Name WWN Fibre Channel AddressingScsi Address Components Arbitrated Loop Port Address AlpaScsi Architecture Model SAM-2 Logical Unit Addressing BitBit Number Address Address Method Specific Definition Peripheral Device Addressing MethodFibreBridge Default Mode Virtual Device Addressing MethodLogical Unit Addressing Method Fibre Channel to Scsi Address Mapping SCSI-3 Command Changes for Hierarchical Addressing SupportSCSI-3 Inquiry Command Address DescriptorsSetting the ID of the FibreBridge What to Expect When Setting Device IDsSCSI-3 Report LUNs Command Addressing Connected Scsi DevicesAtto Technology, Inc Configuration for Consecutive IDs Scsi Device ID Translated LUN as it appears to the HostAtto Technology, Inc Canadian Standards Appendix B Radio and Television InterferenceFCC Standards European StandardsFurther results of FCC Testing Maximum Height = 1.582 4.015 cm Maximum Height = 1.272 3.228 cm Figure C-3 Atto FibreBridge 3200R Connector Layout Appendix D Fibre Channel Resources MIAs Appendix E Fibre Channel AccessoriesField Replacement Units FRU Cables/CopperCables/Optical Cables/FibreChainCables/SCSI Appendix F How to Contact Atto Technology, Inc