Electrical computers and digital data processing systems: input/ – Input/output data processing – Input/output command process
Reexamination Certificate
2011-08-09
2011-08-09
Tsai, Henry W (Department: 2184)
Electrical computers and digital data processing systems: input/
Input/output data processing
Input/output command process
C709S212000, C710S022000
Reexamination Certificate
active
07996573
ABSTRACT:
Certain embodiments of the invention may be found in a method and system for performing SCSI read operations with a CRC via a TCP offload engine. Aspects of the method may comprise receiving an iSCSI read command from an initiator. Data may be fetched from a buffer based on the received iSCSI read command. The fetched data may be zero copied from the buffer to the initiator and a TCP sequence may be retransmitted to the initiator. A digest value may be calculated, which may be communicated to the initiator. An accumulated digest value stored in a temporary buffer may be utilized to calculate a final digest value, if the buffer is posted. The retransmitted TCP sequence may be processed and the fetched data may be zero copied into an iSCSI buffer, if the buffer is posted. The calculated final digest value may be communicated to the initiator.
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Elzur Uri
Fan Kan (Frankie)
McDaniel Scott
Broadcom Corporation
McAndrews Held & Malloy Ltd.
Sun Michael
Tsai Henry W
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