A technician has completed a replacement of the customer's 1Gbps FC switches with new 4Gbps FC switches. All HBAs in the servers and storage arrays were also upgraded. To save money, the customer installed into the original cable plant. After all zoning changes were completed, and devices were brought online, the servers are not able to connect properly to the storage arrays. Which of the following is the MOST likely problem?

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C. The cable plant is not up to specification for the 4Gbps data rates. Fibre Channel cables have specific bandwidth and distance limitations; an older cable plant designed for 1Gbps may not meet the specifications required for reliable 4Gbps data transmission, leading to signal integrity issues and connection failures.

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A. The servers are not running the correct operating system to use 4Gbps. The question states that all HBAs were upgraded, implying the server hardware is capable of 4Gbps, making OS compatibility a less likely primary issue than physical infrastructure incompatibility when explicitly reusing old cables.

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B. Zoning needs to be changed for the new switch Domain IDs. The problem statement explicitly mentions that "all zoning changes were completed," indicating that fabric configuration for the new switches, including domain IDs, has already been addressed.

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D. The storage arrays do not support the new adapter firmware. The question notes that "All HBAs in the servers and storage arrays were also upgraded," which suggests that compatibility with new adapter firmware should not be the root cause of the connection problems.

A technician has completed a replacement of the customer's 1Gbps FC switches with new 4Gbps FC switches. All HBAs in the servers and storage arrays were also upgraded. To save money, the customer inst

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