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3results about "Multilayered discs" patented technology

Handling write commands during a refresh operation in a shingled magnetic recording drive

ActiveUS20260018186A1Multilayered discsErasing methodShingled magnetic recordingMagnetic tape
Write commands in a shingled magnetic recording (SMR) drive are efficiently executed when a write command and associated write data are received by an SMR HDD from a host while the target SMR band for storing the write data is undergoing a refresh operation. In response to the write command, the HDD suspends the refresh operation, stores the write data in nonvolatile memory, and informs the host that the write command has been completed. After the write data are stored in nonvolatile memory, the HDD resumes the refresh operation, and the remaining unrefreshed data in the target SMR band are refreshed by being rewritten to the spare SMR band. The nonvolatile memory can include the spare SMR band in some instances, the target SMR band in some instances, and in both the spare SMR band and the target SMR band in some instances.
Handling write commands during a refresh operation in a shingled magnetic recording drive
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Owner:KK TOSHIBA +1

Magnetic recording medium and magnetic recording device

ActiveUS12462838B2Multilayered discsRecord information storageCondensed matter physicsMaterials science
According to one embodiment, a magnetic recording medium includes a first magnetic region, a second magnetic region, a third magnetic region, a fourth magnetic region, and a fifth magnetic region. The second magnetic region is provided between the fifth magnetic region and the first magnetic region in a first direction from the fifth magnetic region to the first magnetic region. The third magnetic region is provided between the fifth magnetic region and the second magnetic region in the first direction. The fourth magnetic region is provided between the fifth magnetic region and the third magnetic region in the first direction. A first composition ratio of a first Pt atomic concentration to a first Co atomic concentration in the first magnetic region is higher than a second composition ratio of a second Pt atomic concentration to a second Co atomic concentration in the second magnetic region.
Magnetic recording medium and magnetic recording device
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Owner:KK TOSHIBA +1

Handling write commands during a refresh operation in a shingled magnetic recording drive

ActiveUS12640165B2Multilayered discsErasing methodShingled magnetic recordingMagnetic tape
Write commands in a shingled magnetic recording (SMR) drive are efficiently executed when a write command and associated write data are received by an SMR HDD from a host while the target SMR band for storing the write data is undergoing a refresh operation. In response to the write command, the HDD suspends the refresh operation, stores the write data in nonvolatile memory, and informs the host that the write command has been completed. After the write data are stored in nonvolatile memory, the HDD resumes the refresh operation, and the remaining unrefreshed data in the target SMR band are refreshed by being rewritten to the spare SMR band. The nonvolatile memory can include the spare SMR band in some instances, the target SMR band in some instances, and in both the spare SMR band and the target SMR band in some instances.
Handling write commands during a refresh operation in a shingled magnetic recording drive
Handling write commands during a refresh operation in a shingled magnetic recording drive
Handling write commands during a refresh operation in a shingled magnetic recording drive
View all
Owner:KK TOSHIBA +1