# US 2009/0275291 A1 · Storage device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2009/0275291 A1 - Document ID: US20090275291A1 - Status: Published application - Kind: A1 - Application number: 12/333,105 - Filed: 2008-12-11 - Published: 2009-11-05 - Earliest claimed: 2008-04-30 - Assignees: Fujitsu Limited - Inventors: Nobuyuki Myouga; Katsuhiko Takeuchi - Web page: https://patentgrep.com/patent/US20090275291A1 ## CPC - G11B 20/1883: {Methods for assignment of alternate areas for defective areas} - G06F 11/2221: {to test input/output devices or peripheral units} - G11B 27/36: Monitoring, i.e. supervising the progress of recording or reproducing {(for digital recording G11B20/00 and s.gr.; for monitoring, testing or measuring of TV recorders of the type covered by H04N5/76 and subgroups, see H04N17/06)} - G11B 20/1816: {Testing} - G11B 2220/20: Disc-shaped record carriers - G11B 2220/2516: Hard disks - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A storage device controls transmission of test data and reception of the test data according to a protocol set for test mode upon receiving, for example, a test instruction, when a reception interface and a transmission interface are electrically connected together through a cable. The storage device verifies whether the test data transmitted from any one of a controller, a buffer, and a storage medium matches the test data received by any one of them. ## Claims ### Claim 1 A storage device comprising: a transmission controller that controls, in response to a test instruction to operate in test mode for testing whether data is correctly transmitted and received when a signal is output from a transmission interface and input to a reception interface, transmission of test data set for the test mode according to a protocol set for the test mode, the transmission interface for data transmission and the reception interface for data reception that, when electrically connected to the transmission interface, receives the signal from the transmission interface being interfaces connected to an external device; a reception controller that controls, in response to the test instruction, reception of the test data transmitted under control of the transmission controller according to the protocol set for the test mode; and a verifying unit that verifies whether the test data transmitted under control of the transmission controller matches the test data received under control of the reception controller. ### Claim 2 (depends on 1) The storage device according to claim 1, further comprising: a controller that includes the transmission interface and the reception interface; a buffer; and a storage medium, wherein the transmission controller controls transmission of the test data stored in the controller, and the reception controller performs control such that the test data is received by the controller. ### Claim 3 (depends on 1) The storage device according to claim 1, further comprising: a controller that includes the transmission interface and the reception interface; a buffer; and a storage medium, wherein the transmission controller controls transmission of the test data stored in the controller, and the reception controller performs control such that the test data is received by the buffer. ### Claim 4 (depends on 1) The storage device according to claim 1, further comprising: a controller that includes the transmission interface and the reception interface; a buffer; and a storage medium, wherein the transmission controller controls transmission of the test data stored in the controller, and the reception controller performs control such that the test data is received by the storage medium. ### Claim 5 (depends on 1) The storage device according to claim 1, further comprising: a controller that includes the transmission interface and the reception interface; a buffer; and a storage medium, wherein the transmission controller controls transmission of the test data stored in the buffer, and the reception controller performs control such that the test data is received by the buffer. ### Claim 6 (depends on 1) The storage device according to claim 1, further comprising: a controller that includes the transmission interface and the reception interface; a buffer; and a storage medium, wherein the transmission controller controls transmission of the test data stored in the buffer, and the reception controller performs control such that the test data is received by the controller. ### Claim 7 (depends on 1) The storage device according to claim 1, further comprising: a controller that includes the transmission interface and the reception interface; a buffer; and a storage medium, wherein the transmission controller controls transmission of the test data stored in the buffer, and the reception controller performs control such that the test data is received by the storage medium. ### Claim 8 (depends on 1) The storage device according to claim 1, further comprising: a controller that includes the transmission interface and the reception interface; a buffer; and a storage medium, wherein the transmission controller controls transmission of the test data stored in the storage medium, and the reception controller performs control such that the test data is received by the storage medium. ### Claim 9 (depends on 1) The storage device according to claim 1, further comprising: a controller that includes the transmission interface and the reception interface; a buffer; and a storage medium, wherein the transmission controller controls transmission of the test data stored in the storage medium, and the reception controller performs control such that the test data is received by the buffer. ### Claim 10 (depends on 1) The storage device according to claim 1, further comprising: a controller that includes the transmission interface and the reception interface; a buffer; and a storage medium, wherein the transmission controller controls transmission of the test data stored in the storage medium, and the reception controller performs control such that the test data is received by the controller.