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US Patent 12087382 Adaptive threshold for bad flash memory blocks

Patent 12087382 was granted and assigned to Pure Storage on September, 2024 by the United States Patent and Trademark Office.

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Patent Applicant

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Current Assignee

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Patent Jurisdiction

United States Patent and Trademark Office

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Patent Number

Patent Inventor Names

Nenad Miladinovic0

John Boyle0

Matthew D. Fleming0

Eric Mueller0

John Roper0

Hari Kannan0

Eric Michael Verwillow0

Date of Patent

September 10, 2024

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Patent Application Number

163815810

Date Filed

April 11, 2019

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US Patent 7162575 Adaptive implementation of requested capabilities for a logical volume

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Patent abstract

A method of tracking flash memory in a storage system is provided. The method includes initializing a bad blocks threshold value and marking one or more planes or logical unit numbers (LUNs) of flash memory as bad, responsive to determining that bad blocks in the one or more planes or LUNs meet the bad blocks threshold value. The method includes adjusting the bad blocks threshold value, responsive to exceeding a threshold number or rate of retiring planes or LUNs of flash memory, and repeating the marking and the adjusting, with the bad blocks threshold value capped at a maximum threshold value.

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