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parameter allows the host to specify that the peripheral device addressing method will be used regardless of the Addressing Method field in the first level address. This allows custom address translations to be built for systems that may not properly support hierarchical addressing.
Virtual Device Addressing Method
Bit Number
15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
0 | 1 |
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| LUN |
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The LUN field indicates the address of the device to which the command will be routed. The FibreBridge will extract the Bus Number, Target and LUN fields from the LUN based upon parameters contained in FibreBridge
Bit Number
15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
0 | 1 |
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| N/A |
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| LUN |
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| Target |
| Bus Identifier | ||
Again, the location and width of the Bus, Target and LUN fields are field programmable and are stored in FibreBridge
Logical Unit Addressing Method
Bit Number
15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
1 | 0 |
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| Target |
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| Bus Number |
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| LUN |
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The Logical unit address method behaves exactly as the Peripheral device address method with two notable exceptions – field placement and width. The Bus number and Target fields have been moved. The LUN and Target fields are larger and the Bus number field is smaller. The FibreBridge will decode logical unit addressing as described in the peripheral device address method section. Just as with the peripheral and virtual modes, the location and width of the Bus, Target and LUN fields are field programmable. The default mode for Logical Addressing is the same as defined in the
FibreBridge Default Mode
By default, the FibreBridge suppresses the above methods of Hierarchical Addressing and uses its own method, which closely follows the rules of peripheral addressing. This method of addressing is in effect regardless of the Address Method field in the first level address unless you select the option to perform LUN translations.
Bit Number
15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 |
| 2 | 1 | 0 |
0 | 0 |
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| N/A |
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| LUN |
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| Target |
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| Bus | ||
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