System and method for managing execution of internal commands and host commands in a solid-state memory
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United States of America Patent
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Jul 15, 2014
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N/A
app pub date -
May 11, 2010
filing date -
May 11, 2010
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Abstract
Embodiments of the invention are directed to enable simultaneous or nearly simultaneous execution of internal and host-issued commands in a non-volatile storage subsystem while maintaining data consistency. Embodiments maintain validity information on data residing at physical addresses as well as logical to physical address mappings in the solid-state storage subsystem. In one embodiment, a controller within the storage subsystem selectively cancels internal commands that it determines to be writing data that has been rendered invalid by another command. In one embodiment, the determination is made by consulting the validity information kept by the controller in an invalid page table.
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