Memory management schemes for non-volatile memory devices

Patent metadata

Field	Value
Publication number	US-9280299-B2
Application number	US-201414164695-A
Country	US
Kind code	B2
Filing date	Jan 27, 2014
Priority date	Dec 16, 2009
Publication date	Mar 8, 2016
Grant date	Mar 8, 2016

Abstract

A method includes storing data in a non-volatile memory that includes multiple memory blocks. At least first and second regions are defined in the non-volatile memory. A definition is made of a first over-provisioning ratio between a first logical address space and a first physical memory space of the first region, and a second over-provisioning ratio, different from the first over-provisioning ratio, between a second logical address space and a second physical memory space of the second region. Portions of the data are compacted, individually within each of the first and second regions and independently of the other region, by copying the portions from one or more source memory blocks to one or more destination memory blocks using the first and second over-provisioning ratios, respectively.

First claim

The invention claimed is:

1. An apparatus, comprising:
a memory, wherein the memory includes a plurality of regions, wherein each region of the plurality of regions includes a plurality of blocks, and wherein each block of the plurality of blocks includes a plurality of memory cells; and
a controller coupled to the memory, wherein the controller is configured to:
assign a first over-provisioning ratio to a first region of the plurality of regions;
assign a second over-provis…

Assignees

• Apple Inc

Inventors

• Meir Avraham
• Golov Oren

Classifications

• G06F3/0631

  Physics · mapped topic

• G06F3/0604 Primary

  Physics · mapped topic

• G06F3/065

  Physics · mapped topic

• G06F12/0246 Primary

  Physics · mapped topic

• G06F3/0679 Primary

  Physics · mapped topic