Method for backing up data in a case of power failure of storage system, and storage system controller
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United States of America Patent
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Oct 11, 2016
Grant Date -
Mar 19, 2015
app pub date -
Oct 31, 2014
filing date -
Sep 18, 2013
priority date (Note) -
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Abstract
The present invention discloses a method for backing up data in a case of a power failure of a storage system including: when a power failure is detected, acquiring current refresh progress of a buffer in a storage system, an address, in the buffer, of data that is in the buffer and needs to be backed up to a non-volatile memory in the storage system, and a first time required for backing up the data; calculating, according to the current refresh progress of the buffer and the address of the data in the buffer, a second time for which the data can at least keep being not lost since a last refresh; and stopping refreshing the buffer, and backing up the data to the non-volatile memory, if the second time is greater than the first time.
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