Storage device and control method for storage device

Abstract

To make it possible to efficiently detect the occurrence of a defect and identify the location of its causes while suppressing the impact on the performance of a storage system.SOLUTION: A storage device receives data I / O requests sent from an optical module and other devices via the optical module, and performs I / O processing in response to the data I / O requests for the memory device. When the storage device receives a data write request from another device as a data I / O request, it sends a reception-ready notification, which is information indicating that the device is in a state capable of receiving the write data corresponding to the data write request, to the other device, starts a write monitoring timer, which is a timer for monitoring the reception status of the write data, and, when the write monitoring timer times out, acquires the amount of light emitted by a light-emitting element and outputs information indicating the acquired light emission amount.SELECTED DRAWING: Figure 3

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