Preventing data loss in a storage system
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United States of America Patent
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Dec 6, 2011
Grant Date -
May 14, 2009
app pub date -
Nov 13, 2007
filing date -
Nov 13, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
Storage servers use a fast, non-volatile or persistent memory to store data until it can be written to slower mass storage devices such as disk drives. If the server crashes before a write can complete, the data remains safely stored in non-volatile memory. If the data cannot be committed to disk when the server reboots (e.g. because the destination mass storage device is unavailable), it is stored in a file. When the disk reappears, the data in the file may be used to restore a file or file system on the disk to a consistent state.
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