Mirror split brain avoidance
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United States of America Patent
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Sep 19, 2006
Grant Date -
N/A
app pub date -
Mar 21, 2003
filing date -
Mar 21, 2003
priority date (Note) -
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Abstract
A technique includes a set of procedures utilized during the transfer of service of a failed storage system to a surviving storage system of a cluster failover (CFO) configuration during a system outage, such as a disaster scenario. The procedures are executed by a RAID subsystem of the surviving storage system during disaster takeover, storage healing and node restart operations. The procedures prevent the possibility that clients accessing the storage system will see out-of-date versions of the data either during transfer of service of the system during the disaster scenario or subsequently after the storage system is healed and service on the failed system has been restored.
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