Aiwa Raid Technology, Inc.

Encore Computer Corporation

Adriano Roganti

Ronald Bruce Smith

Thomas Wille

Jose Platon Basco

John D Acton

Timothy J Heeter

Roger A Smith

Paardeep K Sood

The present invention provides a method and apparatus for a mass storage subsystem such as a RAID array. The invention includes a housing which defines first and second cavities with the first cavity housing an array controller such as a RAID controller. The second cavity houses a plurality of substantially conventional IDE drives conforming to the 3.5&Prime; form factor. The array is configured to maximize cooling of the array controller and the drives within the extremely small space defined by the housing.

High density RAID subsystem with highly integrated controller

The present invention provides a method and apparatus whereby a single engine can manage multiple DMA queues and related functions for a mass storage subsystem such as a RAID array. By operating the engine at a suitably high clock rate, the key buses may be time multiplexed such that each bus operates at substantially its optimum frequency to maintain high efficiency of data throughput. To improve performance further, the DMA addressing function is allocated additional phases whenever the remaining buses have not requested access to the RAID engine.

Method for managing multiple DMA queues by a single controller

A plurality of processing units, each having a local memory connected thereto is disclosed. A write sense controller is also connected to each of the processing units to transmit a memory write word into a shared portion of local memory over a reflective memory line. Other write sense controllers receive the memory words from the reflective memory bus and cause them to be written into corresponding storage locations in the shared partitions of their local memories.

Method and apparatus for sharing information between a plurality of

Growing community of inventors

Margate, FL, United States of America

Adriano Roganti