Hitachi Global Storage Technologies Netherlands B.v.

Hgst Netherlands, B.v.

Christopher Scott Taylor

Fuminori Sai

Shad Henry Thorstenson

Anthony Edwin Welter

Christopher Scott Dudley

Thomas James Despins

Yasuhiro Takase

A method, apparatus and a data storage device are provided for implementing drive list mode for read and write transfers on a recordable surface of a storage device. Drive List mode provides a queue in a linked list to chain together multiple independent transfers on a single track. The multiple drive independent transfers include at least one of sequential transfers, near-sequential transfers, and random transfers on the single track. A drive list mode transfer of multiple independent transfers on the single track is enabled in one disk revolution, and requiring a single hardware setup for the drive list mode transfer.

Implementing drive list mode for reads and writes for hard disk drives

An embodiment in accordance with the present invention enables storing in a memory, multi-bit data corresponding to analog signals read from a medium before being converted to single-bit data as recorded data. In an embodiment of the present invention, an AD converter is configured to convert analog signals from a magnetic disk to multi-bit data. A buffer circuit holds successively multi-bit data transferred from the AD converter toward a Viterbi decoder, and outputs the held plural multi-bit data in parallel. A SRAM for ECC is used for storing multi-bit data transferred from the buffer circuit.

Storing AD sampled data of read/write channel into ECC SRAM

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Rochester, MN, United States of America

Christopher Scott Taylor