First responder parities for storage array
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jan 16, 2018
Issued Date -
N/A
app pub date -
May 27, 2015
filing date -
May 27, 2015
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Embodiments relate to correcting erasures in a storage array. An aspect includes dividing data into a plurality of stripes for storage in a storage array comprising a plurality of storage locations, each stripe comprising M rows and N columns, each of the M rows including a number r of row parities, wherein r is greater than zero. Another aspect includes dividing each stripe into two or more column sets, each column set comprising a respective set of one or more columns of the stripe. Another aspect includes adding a respective first responder parity to each column set, wherein each first responder parity gives parity information for only the two or more columns in the first responder parity's respective column set. Yet another aspect includes, based on an isolated erasure in a column set, correcting the isolated erasure by reading data from only storage locations corresponding to the column set in which the isolated erasure occurred using the first responder parity of the column set.
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International Classification(s)
- 2015 Application Filing Year
- H03M Class
- 1731 Applications Filed
- 1578 Patents Issued To-Date
- 91.17 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 7 Citation Count
- H03M Class
- 19 % this patent is cited more than
- 7 Age
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