Reliably recovering stored data in a dispersed storage network
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United States of America Patent
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Dec 11, 2018
Grant Date -
Dec 10, 2015
app pub date -
Mar 31, 2015
filing date -
Jun 5, 2014
priority date (Note) -
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Abstract
A method begins by storage units of a dispersed storage network (DSN) receiving a retrieval request for a data object, where each storage unit stores a unique group of encoded data slices of the data object and a local set of encoded recovery data slices. The method continues with some storage units sending the unique group of encoded data slices to a requesting computing device and with one storage unit sending an encoded recovery data slice to the requesting computing device. The method continues with the requesting computing device identifying an errant unique group encoded data slice, correcting the errant encoded data slice based on received data slices to produce an updated unique group of encoded data slices, and dispersed storage error decoding the updated unique group of encoded data slices and the unique groups of encoded data slices from other storage units to recover the data object.
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