Storage controllers with dynamic WWN storage modules and methods for managing data and connections between a host and a storage device
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United States of America Patent
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Jul 13, 2010
Grant Date -
Jan 19, 2006
app pub date -
Jul 19, 2004
filing date -
Jul 19, 2004
priority date (Note) -
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Abstract
A method and system for transferring data between a host and a Serial Attached Small Computer Interface (“SAS”) device using a storage controller is provided. The storage controller includes, a World Wide Name (“WWN”) module that includes a table having plural entries, wherein each row includes a WWN address, an initiator tag value field, an input/output counter value that tracks plural commands for a connection. A WWN index value represents the address of a row having plural entries. The method includes, comparing frame elements of incoming frames, including a unique WWN address with the WWN module entries; and if there is a match, updating a counter value for a connection between the storage controller and a device sending frames. The counter value is increased when a command frame is received and decreased when a command is executed and a response is sent to the device.
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