Checking the validity of blocks and backup duplicates of blocks during block reads
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United States of America Patent
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Dec 9, 2008
Grant Date -
N/A
app pub date -
Jun 14, 2005
filing date -
Apr 15, 2002
priority date (Note) -
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Abstract
File system coherency of a file system, particularly for system blocks, may be maintained by (i) duplicating and verifying the (system) blocks, (ii) writing (system) blocks as a sequence of atomic commands so that at any given time, there is a valid (system) block on a physical storage device, and/or (iii) defining the file system directory data structure with directory blocks, each of the directory blocks having at least one of a directory entry and a pointer, where updates to the directory data structure are performed atomically.
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