Electrical computers and digital data processing systems: input/ – Input/output data processing – Input/output command process
Reexamination Certificate
2008-07-08
2008-07-08
Kindred, Alford W. (Department: 2182)
Electrical computers and digital data processing systems: input/
Input/output data processing
Input/output command process
C710S036000, C710S062000, C710S074000, C709S225000
Reexamination Certificate
active
11430000
ABSTRACT:
There is provided a command multiplex number monitoring control scheme capable of avoiding issue of a QF status and getting rid of system performance degradation without adding command processing resources. Command issue multiplex numbers CMs (32, 16 and 8) for WWN1-LU2, WWN2-LU1and WWN3-LU0are set in a port PT1so as to be associated with the host bus adaptors HBAs in higher rank apparatuses HOST-1, HOST-2and HOST-3. Denoting the sum total of command issue multiplex numbers CMs for respective set access permissions by (C), an access permission satisfying the relationship represented as “command processing multiplex limit number (B)≧the sum total (C) of command issue multiplex numbers CMs for respective access permissions” is not permitted. Thus, the command issue multiplex numbers of the connected higher rank apparatuses are monitored.
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Nagata Koji
Shiraki Shinjiro
Kindred Alford W.
Sorrell Eron J
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