Hewlett-packard Development Company, L.p.

Hewlett-packard Company

Hewlett Packard Enterprise Development LP

Kevin Lloyd-Jones

Stephen Morley

Dominic Paul McCarthy

Peter Joseph Bramhall

There is disclosed a method and apparatus for mapping between logical and physical addresses in a solid state data storage device, particularly but not exclusively a magnetic random access solid state data storage device, in which a list of mappings between ranges of logical addresses and ranges of physical addresses are stored in a data table, the mappings being operated on to look up a physical address from a logical address and vice versa, and being operated on by a data processor, to amend the data mappings by introduction of new ranges of logical and physical addresses, upon ranges of individual physical memory elements becoming defective.

Address mapping in solid state storage device

A data storage device comprises at least one array of memory elements arranged in a plurality of rows and columns; coding means for coding an input data into a form having a balanced proportion of '1's and '0's, said coding means comprising means for applying an output of a pseudo random bit sequence generator to said incoming data, wherein the coded data is stored in the array of memory elements such that the &lsquo;1&rsquo;s and &lsquo;0&rsquo;s are spatially distributed relatively evenly across the plurality of memory elements; and decoding means for decoding the coded data read from the plurality of memory elements, into the original data.

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Bristol, United Kingdom

Kevin Lloyd-Jones