Managing multiple host requests in queued commands that...

Details Managing multiple host requests in queued commands that... Managing multiple host requests in queued commands that...

2008-02-12

2010-11-16

Peyton, Tammara (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output data buffering

C710S052000, C710S057000, C711S105000, C711S160000, C711S162000, C714S758000, C714S762000

Reexamination Certificate

active

07836230

ABSTRACT:
Management of requests from a host to an external storage medium. An execution queue stores commands to be executed, and each command corresponds to a request from the host for data. A holding queue stores executed commands until receipt of an acknowledgment from the host that the host has, e.g., received the data corresponding to the command from the external storage medium. An outgoing queue stores acknowledged commands and has a maximum storage limit. A counter is provided, and a separate logic block increments the counter when a command is stored in the execution queue and decrements the counter when an acknowledged command is deleted from the outgoing queue. The separate logic disables execution of commands stored in the execution queue when the value of the counter equals the maximum storage limit of the outgoing queue.

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