Seagate Technology Incorporated

CheeSeng Toh

YongPeng Chng

HuaYuan Chen

Wesley Chan

ChweeFern Ee

KianKeong Ooi

MingZhong Ding

Bo Wei

Patrick TaiHeng Wong

Steven TianChye Cheok

PohGuat Bay

KokChoon See

JackMing Teng

KwanYin Chow

An intelligent write command routine improves the operational efficiency of a data storage device (DSD) by avoiding media access of the disk when a logical block address (LBA) and the physical sector are unaligned, thus reducing write time. When a write command is received by the DSD from the host, the intelligent write command routine maintains the read data of the read buffer, instead of clearing the read buffer and performing a read of the target sector on the disk per standard protocol. The intelligent write command copies the necessary adjacent sector data from the read buffer as a data patch to the write buffer to splice around the write data received with the write command. Following each write command, the data written to the disk in the write buffer is copied to the read buffer. The read buffer is maintained with the most current data on the disk and does not need to be flushed unless the LBA of the write command is beyond the data ranges stored in the read buffer.

Buffer management for increased write speed in large sector data storage device

A mapping table is modified to match one or more specified storage conditions of data stored in or expected to be stored in one or more logical block address ranges to physical addresses within a storage drive having performance characteristics that satisfy the specified storage conditions. For example, the performance characteristics may be a reliability of the physical location within the storage drive or a data throughput range of read/write operations. Existing data is moved and/or new data is written to physical addresses on the storage media possessing the performance characteristic(s), according to the mapping table. Further, a standard seeding or a seeding override for the re-mapped logical block addresses can prevent read operations from inadvertently reading incorrect physical addresses corresponding to the re-mapped logical block addresses.

Logical block address mapping

A method and apparatus for receiving data at a non-solid state storage device, which includes a store cache and a storage medium. The received data is written to the store cache and transferred from the store cache to the storage medium. In response to receiving a signal at the storage device that is indicative of a power off condition of a data source device from which the data was received, at least a portion of the data remaining in the store cache is transferred to the storage medium prior to powering off the storage device.

Solid state device pattern for non-solid state storage media

A method of handling a write error is provided. A write error is detected during a write operation on at least one data storage segment. A reassignment mode is selected from a plurality of different reassignment modes.

Prediction-based data reassignment

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CheeSeng Toh