SG0-001 · Question #73
A system administrator has recently replaced a failed redundant HBA. Which of the following MUST be done in order to connect the LUNs to the replacement HBA?
The correct answer is D. The SAN zone must be configured for the new WWPN. When replacing a Fibre Channel HBA, the new HBA will have a unique World Wide Port Name (WWPN) which requires updating the SAN zoning configuration to allow LUN access.
Question
A system administrator has recently replaced a failed redundant HBA. Which of the following MUST be done in order to connect the LUNs to the replacement HBA?
Options
- AThe iSCSI initiators must be restarted on the affected servers
- BAll drives must upload the new HBA firmware before it becomes active
- CThe SAN must rebuild the newly installed HBA's file system.
- DThe SAN zone must be configured for the new WWPN
How the community answered
(37 responses)- A8% (3)
- B14% (5)
- C3% (1)
- D76% (28)
Why each option
When replacing a Fibre Channel HBA, the new HBA will have a unique World Wide Port Name (WWPN) which requires updating the SAN zoning configuration to allow LUN access.
iSCSI initiators are used for iSCSI, not Fibre Channel HBAs, and restarting them is not the primary step for a new HBA's LUN connection.
Drives do not upload HBA firmware; HBAs themselves have firmware, but this is not directly related to LUN connectivity after replacement in a SAN zone context.
HBAs are adapters, not storage devices that maintain file systems, so the SAN does not rebuild an HBA's file system.
Each Fibre Channel HBA port has a unique World Wide Port Name (WWPN). When an HBA is replaced, its WWPN changes, and the SAN zoning must be updated to include this new WWPN so that the host can discover and access its LUNs on the SAN.
Concept tested: Fibre Channel HBA replacement and SAN zoning
Source: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/4_1/configuration/guides/fco/fc_config/zoning_config.html
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