Asynchronous tape backup and restore from tape backup in a disk storage environment
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United States of America Patent
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Mar 28, 2017
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N/A
app pub date -
Jul 19, 2016
filing date -
Nov 19, 2014
priority date (Note) -
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Abstract
A first metadata object identifying a set of disk locations which have been written to since a previous consistency group is maintained. Backup data for the consistency group is written. Writing backup data for the consistency group includes identifying a disk location from the set of disk locations, generating a record containing the disk location, data stored at the disk location, and a consistency group value identifying the consistency group, writing the record to a record location in tape storage, and modifying a second metadata object to indicate that the record location contains the record. Records written to tape storage can be used to restore data to disk storage for a given consistency group.
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