Kabushiki Kaisha Toshiba and Toshiba Electronic Devices & Storage Assigned Eleven Patents

Disk device to cover welded part or housing with protective member
Kabushiki Kaisha Toshiba, Tokyo, Japan, and Toshiba Electronic Devices & Storage Corporation, Tokyo, Japan, has been assigned a patent (11488637) developed by Akatsuka, Naoto, Yokohama Kanagawa, Japan, Sato, Yoshinori, Fujisawa Kanagawa, Japan, Kamezawa, Hideaki, Kawasaki Kanagawa, Japan, and Kuribara, Hirofumi, Tokyo, Japan, for a “disk device to cover a welded part or a housing with a protective member.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: “According to one embodiment, a disk device includes a recording medium of a disk form, a magnetic head, a housing, and a first protective member made of a resin. The recording medium includes a recording layer. The magnetic head is configured to read/write information from/to the recording medium. The housing includes a base provided with an inner chamber in which the recording medium and the magnetic head are accommodated, a cover that covers the inner chamber, and a welded part at which the base and the cover are welded to each other. The first protective member is located outside the housing, to cover at least part of the welded part.”

The patent application was filed on 2021-03-11 (17/198521).

Magnetic disk inspection of magnetic disk and device
Kabushiki Kaisha Toshiba, Tokyo, Japan, and Toshiba Electronic Devices & Storage Corporation, Tokyo, Japan, has been assigned a patent (11482252) developed by Watanabe, Toru, Kawasaki Kanagawa, Japan, for “magnetic disk inspection method of magnetic disk device and magnetic disk device.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: “According to one embodiment, when an inspection of a defect of a recording surface of the magnetic disk is carried out by using the first processing section and the second processing section on the basis of the output of the gap sensor, a magnetic disk device is configured to compare a threshold defined on the basis of outputs of the first processing section at a plurality of tracks excluding a track which is an inspection object and an output of the first processing section at the track which is the inspection object with each other and, when the output of the first processing section at the track which is the inspection object exceeds the threshold, detect that there is a defect on the track concerned of the magnetic disk.”

The patent application was filed on 2021-09-07 (17/468581).

Magnetic disk and demodulation method for servo data
Kabushiki Kaisha Toshiba, Tokyo, Japan, and Toshiba Electronic Devices & Storage Corporation, Tokyo, Japan, has been assigned a patent (11475913) developed by Tagami, Naoki, Yokohama Kanagawa, Japan, for “magnetic disk device and demodulation method for servo data.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: “According to one embodiment, a magnetic disk device includes a disk having first servo data including a first preamble, a first servo mark, a first gray code, first burst data, and second burst data written after the first burst data, a head including a write head that writes data to the disk and a first read head and a second read head that read data from the disk, and a controller that reads the second burst data using the first read head and the second read head and calculates a servo demodulation position when the first servo data is servo-read without reading the first burst data in a short servo mode in which the first preamble, the first servo mark, and the first gray code are not read.”

The patent application was filed on 2021-08-20 (17/408103).

Touchdown detection for multiple actuators on magnetic recording device
Kabushiki Kaisha Toshiba, Tokyo, Japan, and Toshiba Electronic Devices & Storage Corporation, Tokyo, Japan, has been assigned a patent (11475914) developed by Higashino, Yoshinari, Chigasaki Kanagawa, Japan, for a “touchdown detection for multiple actuators on magnetic recording device.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: “According to an embodiment, a controller of a magnetic disk device executes control such that detection of touchdowns of one or more first magnetic heads and detection of touchdowns of one or more second magnetic heads are executed at different timings. In addition, the controller executes control such that touchdowns of the one or more first magnetic heads are detected at different timings and touchdowns of the one or more second magnetic heads are detected at different timings.”

The patent application was filed on 2021-03-08 (17/195515).

Magnetic disk and read processing
Kabushiki Kaisha Toshiba, Tokyo, Japan, and Toshiba Electronic Devices & Storage Corporation, Tokyo, Japan, has been assigned a patent (11462240) developed by Kawabe, Takayuki, Sagamihara Kanagawa, Japan, for “magnetic disk device and read processing method.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: “According to one embodiment, a magnetic disk device includes a disk, a head that has a write head that writes data to the disk and a read head that reads data from the disk, and a controller that changes an offset amount during read processing according to a vibration applied by a disturbance.”

The patent application was filed on 2021-02-24 (17/183932).

Magnetic disk
Kabushiki Kaisha Toshiba, Tokyo, Japan, and Toshiba Electronic Devices & Storage Corporation, Tokyo, Japan, has been assigned a patent (11456016) developed by Obuchi, Masaki, Kawasaki Kanagawa, Japan, for a “magnetic disk device.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: “According to one embodiment, a magnetic disk device includes a plurality of magnetic disks, a plurality of magnetic heads provided correspondingly to the plurality of magnetic disks and configured to carry out read/write of data from/to the magnetic disks, and a control section configured to, when the magnetic head is in a second status before the magnetic head enters the first status, change setting in such a manner as to change a first memory area of a magnetic disk corresponding to the magnetic head in the second status among memory areas constituted of the plurality of magnetic disks to a second memory area in which a write count is limited.”

The patent application was filed on 2021-09-08 (17/469324).

Magnetic disk device and information management
Kabushiki Kaisha Toshiba, Tokyo, Japan, and Toshiba Electronic Devices & Storage Corporation, Tokyo, Japan, has been assigned a patent (11450343) developed by Nishida, Masatsugu, Yokohama Kanagawa, Japan, for “magnetic disk device and information management method.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: “According to one embodiment, a magnetic disk device includes a first disk having a first user data region and a first system area, a second disk having a second user data region and a second system area, a first head that writes data to the first disk, a second head that writes data to the second disk, a first actuator having the first head, a second actuator having the second head, a first controller that controls the first disk, the first head, and the first actuator, and a second controller that controls the second disk, the second head, and the second actuator, wherein the first controller records first information related to the first head and the first disk in the second system area.”

The patent application was filed on 2021-03-10 (17/198137).

Drive incorporating wireless components
Kabushiki Kaisha Toshiba, Tokyo, Japan, and Toshiba Electronic Devices & Storage Corporation, Tokyo, Japan, has been assigned a patent (11437076) developed by Okano, Taichi, Fuchu Tokyo, Japan, Liu, Jia, Yamamoto, Nobuhiro, Yokohama Kanagawa, Japan, and Tokuda, Kota, Kawasaki Kanagawa, Japan, for a “drive incorporating wireless components.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: “According to one embodiment, a disk device includes a housing having a first transmission hole, a magnetic disk, a head, a first sealing material having an inner surface and an outer surface and closing the first transmission hole, and a first wireless power feeding device having a first power feeding antenna. The first power feeding antenna is located mere inward of the housing than the outer surface of the first sealing material, and receives power transmitted through the first sealing material by wireless power feeding.”

The patent application was filed on 2020-09-09 (17/015763).

Magnetic disk
Kabushiki Kaisha Toshiba, Tokyo, Japan, and Toshiba Electronic Devices & Storage Corporation, Tokyo, Japan, has been assigned a patent (11410695) developed by Yamane, Masami, Kawasaki Kanagawa, Japan, for a “magnetic disk device.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A magnetic disk device includes a plurality of magnetic disks, a plurality of sliders each including one or more resistive elements, each of which is arranged to face a recording surface of one of the plurality of magnetic disks, and is provided corresponding to the plurality of magnetic disks, and a processor configured to detect a change in a resistance value of one or more of the plurality resistive elements.”

The patent application was filed on 2021-08-20 (17/407471).

Magnetic disk
Kabushiki Kaisha Toshiba, Tokyo, Japan, and Toshiba Electronic Devices & Storage Corporation, Tokyo, Japan, has been assigned a patent (11404084) developed by Koizumi, Gaku, Kawasaki Kanagawa, Japan, for a “magnetic disk device.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: “According to one embodiment, a magnetic disk device includes a magnetic disk, a magnetic head configured to write data on the magnetic disk, an assist section configured to assist, when the magnetic head writes data on the magnetic disk, write of the data by utilizing an assist element, a voltage control section configured to control a voltage to be applied to the assist element, and a positioning control section configured to carry out positioning of the magnetic head relatively to the magnetic disk on the basis of servo data and acquire positional error data of the magnetic head positioned on the basis of the servo data. The voltage control section adjusts the voltage to be applied to the assist element on the basis of the positional error data.”

The patent application was filed on 2021-01-29 (17/162211).

Magnetic disk and error correction processing
Kabushiki Kaisha Toshiba, Tokyo, Japan, and Toshiba Electronic Devices & Storage Corporation, Tokyo, Japan, has been assigned a patent (11404085) developed by Ohtsubo, Jun, Odawara Kanagawa, Japan, for “magnetic disk device and error correction processing method.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: “According to one embodiment, a magnetic disk device includes a disk including a first track including a first parity sector and a second track including a second parity sector, a head that writes data to the disk and reads data from the disk, and a controller that writes, to the first parity sector, a third parity sector obtained by XORing a first sector group included in each of the first track and the second track, and writes, to the second parity sector, a fourth parity sector obtained by XORing a second sector group different from the first sector group, included in each of the first track and the second track.”

The patent application was filed on 2021-08-11 (17/399524).