
Interpreting Hardware Paths
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| Fibre Channel Topology of HBA | ||
Field | Value Information | Fabric Topologies such as Public |
| Private Loop |
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| Loop and Direct Fabric Attach |
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Domain | The value depends | This field is typically the Domain ID |
| This field is set to 8. |
| on the Fibre | of the switch to which the target |
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| Channel topology of | device is attached. The value of |
| For historical reasons, |
| the HBA. | this field is taken from the most |
| uses a Domain ID of 8 to indicate |
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| significant byte of the N_Port ID of |
| Private Loops. Fibre Channel |
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| the target device. |
| switches seen by |
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| cannot be configured with |
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| Domain ID of 8; doing so is |
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| unsupported and will not work. |
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Area | The value depends | This field is taken from the second |
| This field is set to 0. |
| on the Fibre | byte of the N_Port ID of the target |
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| Channel topology of | device. |
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| the HBA. | On some switches, the second byte of |
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| the N_Port ID encodes the switch |
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| port to which the device is |
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| connected. How this encoding is |
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| done depends on the switch. Consult |
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| the relevant switch manual to |
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| interpret this field. |
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Port | The value depends | For LUNs with Peripheral Device |
| For LUNs with Peripheral Device |
| on the Fibre | Addressing, the value of this field is |
| Addressing, the value of this field |
| Channel topology of | always 255. |
| is always 255. |
| the HBA and the |
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| target device, and on | For other LUN methods, the value of |
| For other LUN methods, the |
| the LUN addressing | this field is the least significant byte |
| value of this field is the Loop ID |
| method used. | of the N_Port ID of the target device. |
| of the target device. |
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Bus | The value depends | For LUNs with Peripheral Device |
| For LUNs with Peripheral Device |
| on the Fibre | Addressing, the value of this field is |
| Addressing, the value of this field |
| Channel topology of | the upper |
| is the upper |
| the HBA and the | significant byte of the N_Port ID of |
| ID of the target device. |
| target device, and on | the target device. |
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| the LUN addressing |
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| For LUNs with Logical Unit Addressing, the value is the Bus Number | |||
| method used. | |||
| field of the Logical Unit Number. |
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| For LUNs with Volume Set Addressing (Flat Space Addressing), the | ||
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| value is bits 7 - 13 of the Logical Unit Number | ||
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14 | Chapter 1 |