STORAGE SYSTEM AND STORAGE CONTROL METHOD

摘要

A storage system includes an expander sequence including a plurality of expanders coupled in series, a plurality of storage devices coupled to the expander sequence, first and second initiator devices coupled to the expander sequence, and a processor. The processor selects an optimal path, with respect to a transmission destination device of a command among the plurality of storage devices and the plurality of expanders, between the optimal path which is an initiator device with fewer expanders in a distance to the transmission destination device and a roundabout path which is an initiator device with more expanders in a distance to the transmission destination device, and transmits the command to the transmission destination device through the selected optimal path.

主权项

1. A storage system comprising:
an expander sequence including a plurality of expanders coupled in series; a plurality of storage devices directly coupled to the expander sequence; a first initiator device directly coupled to a first expander which is one of the expanders in the expander sequence; a second initiator device directly coupled to a second expander which is one of the expanders in the expander sequence and different from the first expander; and a processor configured to transmit a command through one of the first and second initiator devices to a transmission destination device of the command among the plurality of storage devices and the plurality of expanders, wherein the processor is configured to select an optimal path, with respect to the transmission destination device, between the optimal path which is an initiator device with fewer expanders in a distance to the transmission destination device and a roundabout path which is an initiator device with more expanders in a distance to the transmission destination device, and to transmit the command to the transmission destination device through the selected optimal path.