Seagate Technology Incorporated

Ajay Narayan Kulkarni

Jon David Trantham

Riyan Alex Mendonsa

Anil Junuthula Reddy

Harry Tiotantra

Sundar Poudyal

Varun Reddy Boddu

Mark A Gaertner

Timothy Richard Feldman

Wenxiang Xie

Brian Thomas Edgar

KayHee Tang

Joseph Wach

David Andrew Rice

Chee Hou Peng

Daniel Thomas Kiser

Ronny Fnu

A method includes creating a table with a plurality of cells indicative of intersections of tracks and wedges on a data storage disc surface. The method also includes storing disc pending command information for different disc pending commands in corresponding different cells of the plurality of cells according to locations for the different disc pending commands on the data storage disc surface. The method further includes searching the table for one or more next disc pending commands of the different disc pending commands to schedule for execution.

Efficient scheduling of data storage disc input/output

A data storage device can have one or more rotating data media with data tracks that are radially disposed from a central spindle. The data tracks may be logically divided into multiple regions while a write strategy is generated with a region module to set a sequence of different regions for future data writes. Receipt of a data write request to the data storage media from a host can prompt the region module to classify the data write request as a sequential or random write in order to intelligently select a region to satisfy the data write request based on the write strategy to maximize data writing consistency for data associated with the data write request.

Intelligent region utilization in a data storage device

ECC is used to for controlling errors in blocks of data by including a measure of redundancy within the data for recovering one or more unreadable portions of the data. A codeword includes at least a message and one or more additional ECC blocks. In the event of an unreadable sector, the ECC is decoded and used to recover the erroneous or missing portion(s) of the message. With disc access parallelism, ECCs can now be distributed across data storage surfaces and/or multiple storage platters. Distribution of ECCs increases the likelihood of recovering data from a head failure or from burst errors on a data storage surface and adds the option to decode parity after only 1/n revolutions.

Distributed error correction coding for parallel storage devices

A system includes a read/write controller removably coupled to a storage drive. Responsive to detection of a coupling between the read/write controller and the storage drive, the read/write controller retrieves key information from the storage drive, uses the key information to locate adaptives associated with the primary storage medium, and loads the adaptives into volatile memory to configure read/write settings for access to the primary storage medium.

Access schemes for drive-specific read/write parameters

Implementations disclosed herein provide for detecting an expected or unexpected power loss event on a storage device. Responsive to the detection of the power loss event, a plurality of potentially affected data blocks are identified and/or marked, such as by a processor, to indicate that data stored therein is potentially corrupted.

Power loss data block marking

A storage system such as a hard disc drive (HDD), solid-state drive (SSD), hybrid drive (SSHD), storage rack, set of storage racks, JBOD, array of discs, etc. may include a variety of storage media. Failures may be detected in the storage media of the storage system. Such a failure may affect the physical capacity of the storage system. A storage controller of the storage system initiates a media conversion that converts a portion of the storage media from media storing data according to a first recording scheme to a media storing data according to a second recording scheme. The second recording scheme stores data at a higher density compared to the first recording scheme.

Self-healing in a storage system

Systems and methods for zone-based band mapping in a data storage device are disclosed. In one embodiment, a device may comprise a first data storage medium including a first band of tracks and a second band of tracks, each band of tracks including multiple adjacent tracks that are at least partially overlapped. The device may further comprise a processor configured to receive a write command to store received data to the first band of tracks, read previously stored data from the first band of tracks, modify the previously stored data with the received data to generate first modified data, write the first modified data to the second band of tracks, and assign a first data storage location indicator previously associated with the first band of tracks to the second band of tracks.

Growing community of inventors

Longmont, CO, United States of America

Ajay Narayan Kulkarni