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Step 1 Check the status of the two controllers on the OSM. They are in the normal state.
Step 2 Restart the S5600. The fault persists, but the slots and the number of the “yellow disks” are different from previous situation. Restart the S5600 twice again and find that the slots and the number of the “yellow disks” are different each time the S5600 is restarted. Therefore, these “yellow disks” appear randomly and are unrelated to the controllers.
Step 3 Consult the R&D engineers. The fault is caused by FC link limitation. Check the connection of optical fibers and find that the both controllers are connected to disk enclosure by using port EXP0. Reconnect the two controllers to disk enclosure by using port EXP1, and restart the S5600. The status of all disks become normal.