Intel Corporation

Daniel H Leemann

Robert N Hasbun

A method for storing data in a memory partitions the memory into a plurality of partitions. A primary logical identifier is stored in the memory to identify each partition of data. A secondary identifier number is also stored in the memory to identify each partition of data, the secondary logical identifier redundant to the primary logical identifier. A primary logical identifier is used to locate at least one partition of data stored in the memory after receiving a requested partition number identifying a requested partition. The secondary logical identifier is used to compute a value to further identify the at least one partition of data. The value is computed by performing a logical AND operation between the primary logical identifier and the secondary logical identifier. This value is compared with the requested partition number. A method of detecting column short bit locations in a memory arranged as m words of n bits of memory. First a written stripe of data is written to the memory, each bit of the written stripe of data having a known value. The written stripe of data is read from memory. The written stripe of data is compared to the read stripe of data. The bit errors are located by locating a position of each inverted known value in the read stripe of data.

Method and apparatus for error management in a solid state disk drive

A method of accessing a memory includes the step of partitioning the memory into a plurality of partitions. A primary logical identifier is stored in the memory to identify each partition. A redundant secondary logical identifier is also stored in the memory to identify each partition. In response to a requested partition number identifying a partition to access, at least one partition of data is located using a first stored logical identifier formed from a portion of each of the primary and secondary logical identifiers. The at least one partition of data is then identified using a second stored logical identifier formed from a portion of at least one of the primary and secondary logical identifiers. In one embodiment, a first error detection code (EDC) stored in the header is used to validate the partition data. If an error is detected, the validity of the partition data is tested using an EDC computed by ANDing the first EDC and a second EDC stored in the header. During a clean-up operation, a header is selected from a block targeted for clean-up. The first and second stored logical identifiers in the selected header are compared with each other. If there is not a match, then validation is performed using the ANDed value of the first and second stored logical sector number. In one embodiment, the memory is a flash electrically erasable programmable read only memory. In one embodiment, the partitions are sectors and the identifiers are sector numbers.

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Folsom, CA, United States of America

Daniel H Leemann