Disk array apparatus

摘要

A disk array apparatus using an SAS can transfer data without lowering a transfer efficiency of data even if rates of a plurality of physical links connected to a controller and storage device are different. A plurality of HDDs are connected to a controller through an expander. Data are transferred from the controller to the expander and then to HDD. In this connection, the controller and the expander transfers a set of transfer data in a plurality of the HDD-side physical links. The controller-side physical link integrates the transfer data, and multiplexes them to transfer. A plurality of HDDs-side physical links separates the transfer data to transfer in parallel.

主权项

1. A storage system comprising:
a storage controller executing a discovery process according to SAS (serial attached small computer system interface) protocol; a SAS expander device coupled to the storage controller; and a plurality of storage devices, each of the plurality of storage devices having a physical port coupled to the SAS expander device, wherein the SAS expander device is configured to:
recognize what type of physical links connect the physical ports of each of the storage devices to the SAS expander device, the type of each of the physical links indicating a transmission capacity of each of the physical links, respectively;generate routing information for the discovery process executed by the storage controller according to SAS protocol including SAS addresses of the plurality of storage devices; andsend a single report, including information based on the type of physical links connecting the physical ports of each of the storage devices, to the storage controller in response to a single command from the storage controller.