Control path failover in an automated data storage library
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United States of America Patent
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Jan 8, 2008
Grant Date -
Jun 3, 2004
app pub date -
Nov 8, 2002
filing date -
Nov 8, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A system, a method, and a computer program product to provide a failover procedure for an automated data storage library are provided. During the operation of a data storage library, a host computer issues control commands to the automated data storage library using one or more control paths. In the event that the host does not receive desirable results, such as when communication is lost between the host computer and the automated data storage library while a command is in process, the host computer may attempt to retry the same command using the same control path or an alternate control path. When the host issues a retry of the same command, the automated data storage library performs an examination of the command and one or more previous commands executed to prevent the automated data storage library from executing an identical command more than once.
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