SG0-001 · Question #326
The storage system has been provisioned and a rescan of the devices has been performed within the operating system. A technician sees twice as many devices than were provisioned. Which of the followin
The correct answer is C. Multipathing has not been installed or configured.. The issue describes seeing duplicate storage devices after provisioning and rescanning, indicating a problem where the operating system recognizes multiple paths to the same logical unit.
Question
The storage system has been provisioned and a rescan of the devices has been performed within the operating system. A technician sees twice as many devices than were provisioned. Which of the following is the MOST likely cause?
Options
- AOne of the fiber connections is loose.
- BOne of the HBAs is zoned incorrectly.
- CMultipathing has not been installed or configured.
- DThe technician rescanned the devices more than once.
How the community answered
(29 responses)- A3% (1)
- B7% (2)
- C69% (20)
- D21% (6)
Why each option
The issue describes seeing duplicate storage devices after provisioning and rescanning, indicating a problem where the operating system recognizes multiple paths to the same logical unit.
A loose fiber connection would likely result in fewer, or no, devices being detected, not twice as many.
Incorrect HBA zoning would either prevent access to devices or expose incorrect devices, not typically result in seeing precisely double the expected devices.
When a server has multiple HBA connections to a storage system, it will detect the same LUN through each path; multipathing software consolidates these redundant paths into a single logical device, preventing the OS from seeing duplicates. Without multipathing, each path to the LUN is presented as a separate device.
Rescanning multiple times does not inherently create duplicate device entries if multipathing is properly configured; the OS would still present unique LUNs, not multiples of the same LUN.
Concept tested: Storage Area Network (SAN) multipathing configuration
Source: https://learn.microsoft.com/en-us/windows-server/storage/multipath-io/overview
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