Seagate Technology Incorporated

Daniel Joseph Coonen

Abhay Tejmal Kataria

Timothy Richard Feldman

Robert Pomeroy

Harathi Tadepalli

Brandon W Muhlach

Jonathan Williams Haines

Edwin Scott Olds

Kendall Hayne Fung

A method for identifying a drive malfunction source includes receiving as input multiple drive event records each recorded by a different one of multiple storage drives in a mass storage system. Among other data, each one of the drive event records including internal tasks performed by the associated storage drive and communications transmitted between an external host and a controller of the associated storage drive. The method may further include comparing the drive event records using a processor to identify at least one discrepancy in recorded drive events indicative of the drive malfunction source.

In-drive bus trace

The technology disclosed herein provides a method of verifying data read from a data block when the cell number of the data block does not match an ECC value stored in the data block. In particular, the method includes designating as unusable a data block in an indexed sequence of data blocks, wherein each data block is associated with a physical index; associating a cell number with a subsequent usable data block following the identified data block in the indexed sequence; and recording in an offset table accessible by an error detection and correction module an offset in association with the cell number of the subsequent usable data block, wherein the combination of the offset and the cell number represents a seed for the error detection and correction module.

Error correction code seeding

The technology disclosed herein provides a method of verifying data read from a data block when the cell number of the data block does not match an ECC value stored in the data block. In particular, the method includes accessing a data block in an indexed sequence of data blocks based on a cell number, wherein each data block in the indexed sequence includes a stored ECC value; retrieving an offset associated with the cell number of the data block; generating an ECC value based on the cell number and the offset; and determining whether the generated ECC value and the stored ECC value satisfy an integrity condition.

The disclosure is related to systems and methods of management of memory. In a particular embodiment, a system is disclosed that comprises a control circuit adapted to compare a second data set to a first data set and to selectively replace the first data set with the second data set without performing an erase operation based on the comparison, wherein the erase operation is not performed when the first data set and the second data set differ only when locations of the second data set include a first logic value corresponding to one or more locations of the first data set that include a second logic value.

System and method of managing memory

Systems and methods of monitoring logical block address (LBA) activity are disclosed. In an embodiment, a pattern of a data storage device may be monitored. An LBA may be detected that is accessed based on the pattern. The LBA may be added to a list of LBAs stored in a memory.

System and method of monitoring data storage activity

Method and system for determining spin pad length in a data storage system. The data storage system has a data storage medium having at least one track for storing a plurality of data sections, a timing reference mark for the at least one track, and a recording head for writing the plurality of data sections on and for reading the plurality of data sections from the data storage medium. The data storage system further has a spin pad length determining mechanism for determining the length of a spin pad to be written on the at least one track as a function of distance from the timing reference mark during an operation of writing a data section on the at least one track. By writing spin pads of proper length on the at least one track, the total space occupied by the spin pads on the at least one track is minimized, thus providing additional space to store data.

Method and system for determining spin pad length

A data storage device includes a track layout having three data sections. A first spin pad having a first length is located between a first and second data section. A second spin pad having a length that is different from the first length is located between the second data section and a third data section. A method for determining the lengths of the spin pads is also provided.

Growing community of inventors

Longmont, CO, United States of America

Daniel Joseph Coonen