Management of erase operations in storage devices based on flash memories
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United States of America Patent
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Issued Date -
Nov 13, 2008
app pub date -
May 9, 2007
filing date -
May 9, 2007
priority date (Note) -
Abandoned
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Abstract
A method of freeing physical memory space in an electrically alterable memory that includes a plurality of physical memory blocks includes a plurality of physical memory pages. Each physical memory block may be individually erased as a whole, and which memory is used to emulate a random access logical memory space including a plurality of logical memory sectors by storing updated versions of a logical memory sector data into different physical memory pages. The method includes causing a most recent version of multiple versions of logical memory sector data, stored in physical pages of at least one physical memory block, to be copied into an unused physical memory block, marking the at least one physical memory block, and when the electrically alterable memory is idle, erasing the marked physical memory block.
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