ATTO Technology 2200R/D, 3200R What to Expect When Setting Device IDs, SCSI-3 Report LUNs Command

Page 47

ATTO Technology, Inc.

ATTO FibreBridge Installation & Operation Manual

and the Report LUNs command as described in the next section. FibreBridge hierarchical addressing is limited to the first-level LUN support. More information is available in the reference documentation.

SCSI-3 REPORT LUNs Command

The SCSI-3 Report LUNs command returns a sorted list of LUNs available (at the time of execution of the Report LUNs command) on the FibreBridge. LUNs in the returned LUN-list are formatted according to the Peripheral Device Addressing Method. Although Report LUNs may be issued to the FibreBridge or to any SCSI device attached to the FibreBridge, it is always executed by the FibreBridge and is not forwarded to any attached SCSI devices. Additional information is available in the reference documentation.

What to Expect When Setting Device IDs

Most users will be able to use the FibreBridge Default Addressing Method to achieve full functionality.

Setting the ID of the FibreBridge

The ID is determined from either the Soft or Hard Fibre Channel ID of the FibreBridge (AL_PA). The FibreBridge is set to use Soft IDs by default. The bridge can be set to use a Hard ID by using FibreBridge Services to set the appropriate bit in the NVRAM. The LUN of the FibreBridge can also be set using FibreBridge Services (BridgeTools is recommended). The default value is 14.

If you want the FibreBridge to be detected by the operating system, its Soft Fibre LUN value must be set within the range of the operating system. The bridge does not need to be detected for normal operation. The bridge DOES need to be detected if you want to use the in-band connection method for BridgeTools. The FibreBridge will never be detected in UNIX environments because the operating system does not contain a native device driver for bridge devices.

Addressing Connected SCSI Devices

Below is the default addressing mode bit definitions. Bits 0 through 7 are used to fully define a SCSI device with a Target ID and a LUN connected to one of the two FibreBridge busses.

Bit Number

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

0

0

 

 

N/A

 

 

 

LUN

 

 

Target

 

Bus

An operating system will identify this SCSI device under the AL-PA of the FibreBridge, based upon its hard or soft ID, and the LUN based upon the bit definition above.

The four bit Target Field gets filled in from the SCSI ID (0 through 15) that you select for your connected SCSI device. The three bit LUN Field gets filled in from the SCSI LUN (0 through 7) selected for your connected SCSI device. Since the FibreBridge contains two independent busses, but is only being detected as a single device from the host's point of view, the FibreBridge must manage the addressing between bus 1 and bus 2. The bus bit(s) in the LUN byte is used to distinguish between SCSI bus 1 and

2.If you set the bus bit(s) to 0, SCSI Bus 1 of the FibreBridge will be selected. A 1 will select Bus 2. The default addressing mode of the FibreBridge has the Bus Identifier bit in position 0. This translates to Bus

ATTO Technology, Inc.

- 42 -

Page 46 Page 48
Image 47
Page 46 Page 48
Contents Atto Technology, Inc Atto FibreBridge Atto Technology, Inc Atto Fibrebridge Benefits and Features Updating the Firmware Within the Fibrebridge Atto Technology, Inc FC Rack System Product Description IntroductionFibreBridge Product Module Description References Fibre Channel TechnologyAtto FibreChain Atto FibreBridge Benefits and FeaturesFibre Channel Switch Support FibreBridge Feature Comparison FeatureMounting Atto FC Rack Enclosure and Power ModulesPhysical Dimensions Cooling Fans EnvironmentalCooling Airflow Power Module Internal Power DistributionInstallation and Removal LED IndicatorIEC Power Receptacle and Switch Atto FC Rack System Installation Considerations Atto FibreBridge Product Module Integration Power RequirementsAtto FibreBridge Power Connector Scsi Ports Fibre Channel PortsAtto FibreChain Port LEDs 2100R model only LED IndicatorsFibreChain Ports 2100 model only Serial Port Ethernet PortFibreBridge2200R/D Front View FibreBridge 2200R/D2200R/D Side view with hole dimensions Cooling and Airflow Power SupplyScsi Fibre Channel PortLED Indicators on FibreBridge 2200R/D Scsi Cabling Quick Installation InstructionsCabling a FibreBridge Scsi Termination Typical Scsi CablesCable Length ConnectorConnector Laser Type Fibre Channel CablingGbic Module and Gbic Guide System Gbic Installation InstructionsPin # Name Gbic Removal InstructionsMedia Interface Adapters MIA MIA Installation MIA DB9 ConnectorMonitoring and Managing the Atto FibreBridge FibreBridge ServicesAtto BridgeTools Graphical Interface Configuration Program Accessing the Atto FibreBridge over the RS-232 interfaceSetting up the IP Address using the RS-232 port Accessing the Atto FibreBridge over the Ethernet PortAccessing through FTP Atto Technology, Inc What is Serverless Backup? Serverless Backup SupportSegment Descriptors General Operation of Serverless BackupEnabling Serverless Backup on the FibreBridge Target DescriptorsFlashing the FibreBridge Updating the Firmware Within the FibreBridgeIdentifying the FibreBridge Addressing Scsi DevicesIdentifying the Scsi Devices Connected to the FibreBridge Default Address Translation Addressing Devices Connected to the FibreBridge Appendix a Fibre Channel to Scsi Address MappingArbitrated Loop Port Address Alpa Fibre Channel AddressingScsi Address Components Fibre Channel World Wide Name WWNBit Scsi Architecture Model SAM-2 Logical Unit AddressingPeripheral Device Addressing Method Bit Number Address Address Method Specific DefinitionLogical Unit Addressing Method FibreBridge Default ModeVirtual Device Addressing Method Address Descriptors SCSI-3 Command Changes for Hierarchical Addressing SupportSCSI-3 Inquiry Command Fibre Channel to Scsi Address MappingAddressing Connected Scsi Devices What to Expect When Setting Device IDsSCSI-3 Report LUNs Command Setting the ID of the FibreBridgeAtto Technology, Inc Scsi Device ID Translated LUN as it appears to the Host Configuration for Consecutive IDsAtto Technology, Inc European Standards Appendix B Radio and Television InterferenceFCC Standards Canadian 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 Cables/Copper Appendix E Fibre Channel AccessoriesField Replacement Units FRU MIAsCables/SCSI Cables/OpticalCables/FibreChain Appendix F How to Contact Atto Technology, Inc
Top Page Image Contents