Electronic equipment including storage device
AssigneeToshiba Memory Corporation
InventorKiyotaka Matsuo
Life of this patent
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Abstract
According to one embodiment, a storage device includes a nonvolatile memory, controller and interface. The nonvolatile memory stores data. The controller controls the operation of the nonvolatile memory. The interface includes first and second input/output units that transmit and receive a signal with respect to a host device. The first and second input/output units are set on the first hierarchy having the same communication function. The interface issues a connection request to the first input/output unit and when the connection request to the first input/output unit is rejected, the interface issues the connection request to the second input/output unit.
Claims20
A storage device communicable with a host with a Serial Attached SCSI (SAS) interface, the host including a first SAS wide port, the first SAS wide port including a first phy and a second phv, the storage device comprising:
- a nonvolatile memory;
- and
- a controller including a second SAS wide port, the second SAS wide port including a third phy and a fourth phy, wherein
- the controller is configured to:
- generate a first frame to be transmitted to the host;
- while a connection is established between the fourth phy and the second phy, transmit a connection request through the third phy to the first phy;
- and
- in a case that the connection request transmitted through the third phy is rejected, transmit the first frame to the host using the connection established between the fourth phy and the second phy.
A method of controlling a storage device, the storage device being communicable with a host with a Serial Attached SCSI (SAS) interface, the host including a first SAS wide port, the first SAS wide port including a first phy and a second phy, the storage device including a nonvolatile memory and a controller that includes a second SAS wide port, the second SAS wide port including a third phy and a fourth phy, the method comprising:
- generating a first frame to be transmitted to the host;
- transmitting a connection request through the third phy to the first phy while a connection is established between the fourth phy and the second phy;
- and
- in a case that the connection request transmitted through the third phy is rejected, transmitting the first frame to the host using the connection established between the fourth phy and the second phy.
Dependencies are inferred from the claim text.