Storage control system with improved system and technique for destaging data from nonvolatile memory
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United States of America Patent
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Apr 4, 1995
Grant Date -
N/A
app pub date -
Dec 17, 1992
filing date -
Dec 17, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Improved system for destaging data from a nonvolatile memory. The system is operative after a failure of an associated first cache memory for which the nonvolatile memory stores backup data. The invention is adapted to scan the nonvolatile memory to identify control data stored therein. Next a directory structure is built from control information in the nonvolatile memory which is used to provide rapid access to data stored therein. In a particular implementation, the directory structure is stored as a plurality of pointers in data storage space allocated in a second cache. Data may then be destaged from the nonvolatile memory in a more efficient manner by which records from a particular track are grouped together.
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