Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2009-04-20
2011-11-22
Mai, Son (Department: 2827)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C711S154000, C711S165000
Reexamination Certificate
active
08065469
ABSTRACT:
Methods for extending the service life of a data storage device and devices operable to perform those methods are presented. A master lookup table block may comprise lookup table blocks and store an erase count indicator for each lookup table block. Each lookup table block may be associated with a logical zone of a memory and comprise entries. Each entry may be associated with a logical block and comprise an erase count for a physical block corresponding to that logical block. A physical block erasure may be performed on a first physical block in the memory. The physical block erasure may be tracked by incrementally increasing a first erase count. An actual erase count may be determined for the first physical block. The entry for a logical block corresponding to the first physical block may be exchanged with another entry within a different lookup table block when the actual erase count for the first physical block exceeds a threshold. The different lookup table block may have a lower erase count indicator relative to that of the lookup table block comprising the entry for the logical block corresponding to the first physical block.
REFERENCES:
patent: 5341339 (1994-08-01), Wells
patent: 5404485 (1995-04-01), Ban
patent: 5479638 (1995-12-01), Assar et al.
patent: 5937425 (1999-08-01), Ban
patent: 7096313 (2006-08-01), Chang et al.
patent: 7120729 (2006-10-01), Gonzalez et al.
patent: 7441067 (2008-10-01), Gorobets et al.
patent: 7451264 (2008-11-01), Yero
patent: 7594062 (2009-09-01), In et al.
patent: 7797481 (2010-09-01), Lee et al.
patent: 2007/0016756 (2007-01-01), Hsieh et al.
patent: 2007/0028033 (2007-02-01), Hsieh et al.
patent: 2007/0038802 (2007-02-01), Tsai et al.
patent: 2007/0294490 (2007-12-01), Freitas et al.
patent: 2009/0094409 (2009-04-01), Yeh et al.
patent: 2009/0259819 (2009-10-01), Chen et al.
patent: 2010/0023675 (2010-01-01), Chen et al.
patent: 2010/0115186 (2010-05-01), Chang et al.
patent: 2010/0161880 (2010-06-01), You
patent: 2010/0185805 (2010-07-01), Chen et al.
Dorsey & Whitney LLP
Imation Corp.
Levitt Kenneth E.
Mai Son
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