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Mapped Disks are Lost in Linux

Publication Date:  2012-07-18 Views:  99 Downloads:  0
Issue Description
At a commercial deployment, an IBM 3850 server installed with the Red Hat 5.5 operating system connects to the S5500 through an FC switch. After configuration, mapped disks can be properly detected in Linux. However, mapped disks become lost in Linux after a period. During the troubleshooting, storage settings and the storage device are found normal. By restarting the server, no disk can be detected as well.
Alarm Information
none
Handling Process
Disk mappings recover after the optical fiber is replaced. This proves that the faulty is caused by the optical fiber.
Root Cause
By checking the connections between the storage device and switch as well as between the switch and the server, the connection between the storage device and switch is lost, and the optical port indicators on the switch and the storage device are off. Therefore, the problem is caused by the faulty optical fiber connection.
Suggestions
None

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