| http://www.w3.org/ns/prov#value | - snapshot backup including: i) reading old data on the primary system drive that is to be overwritten by the new data in response to the write operation; ii) buffering the old data in the buffer; iii) overwriting the old data with the new data; iv) writing the old data from the buffer to the log system drive if the write operation is a first write operation to the sector in the primary system driv
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