SG0-001 · Question #148
When deploying a LUN from a storage array to a host over a SAN, which of the following steps must be done for the host to see the LUN? (Select TWO).
The correct answer is A. The switches must be zoned to allow the host to see the array E. The array must be configured to expose the LUN to the host. For a host to discover a LUN from a storage array over a SAN, the Fibre Channel switches must be zoned to allow communication between the host and the array, and the storage array must be configured to expose that specific LUN to the host.
Question
When deploying a LUN from a storage array to a host over a SAN, which of the following steps must be done for the host to see the LUN? (Select TWO).
Options
- AThe switches must be zoned to allow the host to see the array
- BThe host must authenticate against the array for SCSI access
- CThe host must enable the Persistent Binding Function on its HBA
- DThe switches must be zoned to allow the host to see the LUN
- EThe array must be configured to expose the LUN to the host
How the community answered
(23 responses)- A74% (17)
- B13% (3)
- C9% (2)
- D4% (1)
Why each option
For a host to discover a LUN from a storage array over a SAN, the Fibre Channel switches must be zoned to allow communication between the host and the array, and the storage array must be configured to expose that specific LUN to the host.
Zoning configures Fibre Channel switches to establish a logical path between the host's HBA port(s) and the storage array's target port(s), which is essential for the host to discover and communicate with the array.
While authentication provides security, it is not universally required for a host to simply "see" or discover a LUN, as zoning and LUN masking primarily control visibility and access in Fibre Channel SANs.
Persistent binding ensures consistent device naming after discovery but is not a prerequisite for the host to initially detect or "see" the LUN.
Zoning is configured between HBA ports and array ports to allow the host to see the array; the host then discovers LUNs presented by the array, making option A more accurate.
The storage array must be explicitly configured to present or mask the specific LUN to the host's initiator WWN(s), allowing the host to detect and access that LUN.
Concept tested: SAN LUN deployment steps (zoning and LUN masking)
Source: https://learn.microsoft.com/en-us/windows-server/storage/storage-spaces/deploy-storage-spaces-direct#step-3-zone-the-fibre-channel-switches-optional
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