Micron Technology Incorporated

Akonia Holographics LLC

John J Kane

Mark R Ayres

Byron D Harris

Paul C Smith

Vivek Shivhare

Alan Hoskins

Methods, systems, and devices for plane balancing in a memory system are described. A memory system may select a memory die for writing a set of data. The memory die may include a plurality of planes each of which may include a respective plurality of blocks of memory cells. Based on selecting the memory die, the memory system may determine a first plane of the plurality of planes that has a first quantity of blocks with an availability status and a second plane of the plurality of planes that has a second quantity of blocks with the availability status. The memory system may write the set of data to the plurality of planes, excluding at least the first plane, based at least in part on the first quantity of blocks and the second quantity of blocks.

Plane balancing in a memory system

A method for adjusting at least one alignment control axis of a holographic data storage system or device to or towards a sufficiently optimal recovery position for recovery of a hologram based on a derived feedback error signal and/or a derived feed-forward signal. For the next hologram in the sequence, the derived feedback error signal estimates the direction and magnitude of misalignment of the at least one alignment control axis for one or more previously recovered holograms based on alignment-indicating data. The derived feed-forward signal estimates an optimal alignment value for the at least one alignment control axis for one or more holograms based on recording and recovery operating condition data for the holograms. An iterative alignment procedure may also be used to derive a feedback error signal for one hologram.

Use of feedback error and/or feed-forward signals to adjust control axes to optimal recovery position of hologram in holographic data storage system or device

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Westminster, CO, United States of America

John J Kane