Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Patent
1997-09-18
2000-04-25
Gossage, Glenn
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
711114, 710 54, G06F 1300
Patent
active
06055603&
ABSTRACT:
A method of improving the performance of a storage system is provided. The method includes sending a pre-request to a logical device before data associated with the previous request is transferred from a cache to the requesting host device. Additionally, while a host controller of the storage system is transferring data from the cache to the requesting host, it will also check to see if any other requests are entered in a request queue for that logical device. To do this, the host controller checks a status flag in a mailbox location within the host controller. A disk controller is also responsive to the placement of requests in the mailbox location and can set the status flag upon a completion of a data transaction. If there has been an entry, a pre-request will be sent to the logical device while the data from the previous request is being transferred to the host.
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Fitzgerald John
Halligan Kenneth
Ofer Erez
EMC Corporation
Fitzgerald Leanne J.
Gossage Glenn
Gunther John
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