System maps SCSI device with virtual logical unit number and multicast address for efficient data replication over TCP/IP network
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United States of America Patent
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Mar 8, 2005
Grant Date -
Mar 7, 2002
app pub date -
May 23, 2001
filing date -
May 23, 2000
priority date (Note) -
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Abstract
The present invention combines IP multicasting mechanisms with SCSI protocols to achieve a more efficient data replication or data mirroring scheme. The combination of the IP multicast mechanism with the mapping of virtual unit logical number to real logical unit numbers, combined with the use of SCSI response frames, ensures the integrity of multicasted data. By use of the SCSI protocol over the TCP/IP according to the present invention, there is no further need to transfer multiple copies of the same data on the same communication link, and the routing logic may be removed from initiator and targets to IP routers.
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