Invention Grant
- Patent Title: Metadata redundancy schemes for non-volatile memories
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Application No.: US14745994Application Date: 2015-06-22
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Publication No.: US09342449B2Publication Date: 2016-05-17
- Inventor: Daniel J. Post , Vadim Khmelnitsky , Nir Jacob Wakrat
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: APPLE INC.
- Current Assignee: APPLE INC.
- Current Assignee Address: US CA Cupertino
- Agency: Van Court & Aldridge LLP
- Main IPC: G06F12/02
- IPC: G06F12/02 ; G06F11/14 ; G06F11/16

Abstract:
Systems and methods are provided for storing data to or reading data from a non-volatile memory (“NVM”), such as flash memory, using a metadata redundancy scheme. In some embodiments, an electronic device, which includes an NVM, may also include a memory interface for controlling access to the NVM. The memory interface may receive requests to write user data to the NVM. The user data from each request may be associated with metadata, such as a logical address, flags, or other data. In response to a write request, the NVM interface may store the user data and its associated metadata in a first memory location (e.g., page), and may store a redundant copy of the metadata in a second memory location. This way, even if the first memory location becomes inaccessible, the memory interface can still recover the metadata from the backup copy stored in the second memory location.
Public/Granted literature
- US20150309928A1 METADATA REDUNDANCY SCHEMES FOR NON-VOLATILE MEMORIES Public/Granted day:2015-10-29
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