Disk control device and storage device using it
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Oct 5, 2004
Grant Date -
Nov 22, 2001
app pub date -
Aug 28, 1998
filing date -
Sep 3, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for use in a storage device having at least two clusters, each including a disk control device having a plurality of channel controllers that send and receive commands and data to and from an upper system, a plurality of disk controllers that control disk units, and a cache that temporarily stores data between the upper system and the disk units. The apparatus includes a first bus included in a first cluster. The first bus is connected to the channel controller, the disk controller and the cache of the first cluster. A second bus is included in a second cluster. The second bus is connected to the channel controller, the disk controller and the cache of the second cluster. A common resource is connected to the first bus of the first cluster and the second bus of the second cluster. The common resource includes a specified set of data which is commonly accessible from each of the channel controllers or the disk controllers of the clusters.
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