公开(公告)号：US20040255181A1

公开(公告)日：2004-12-16

申请号：US10446911

申请日：2003-05-28

申请人： IBM Corporation

发明人： Yu-Cheng Hsu ,  Vernon J. Legvold

IPC分类号： H02H003/05

CPC分类号： G06F11/1441 ,  Y10S707/99945 ,  Y10S707/99948

摘要： An improved storage controller and method for storing and recovering data are disclosed. The storage controller includes a first cluster for directing data from a host computer to a storage device and a second cluster for directing data from a host computer to a storage device. A first cache memory is connected to the first cluster and a second cache memory is connected to the second cluster. A first preserved area of memory is connected to the first cluster and a second preserved area of memory is connected to the second cluster. Data is directed to the first cache and backed up to the second preserved area in a normal operating mode. Similarly, data is directed to the second cache and backed up to the first preserved area in the normal operating mode. In the event of a power failure or comparable event, data from the first and second preserved areas are transferred to, and stored on, a first storage device. Additionally, data from the first and second preserved areas are transferred to, and stored on, a second storage device. Thus, upon resumption of normal operation, if one of the clusters subsequently fails to resume normal operations, data from the failed cluster is available through the operating cluster.

摘要翻译： 公开了一种用于存储和恢复数据的改进的存储控制器和方法。 存储控制器包括用于将数据从主计算机引导到存储设备的第一集群和用于将数据从主计算机引导到存储设备的第二集群。 第一高速缓存存储器连接到第一集群，并且第二高速缓存存储器连接到第二集群。 存储器的第一保留区域连接到第一集群，并且第二存储器区域连接到第二集群。 数据被定向到第一缓存并且以正常操作模式备份到第二保留区域。 类似地，数据被引导到第二高速缓存并且在正常操作模式下备份到第一保留区域。 在电源故障或类似事件的情况下，来自第一和第二保留区域的数据被传送到第一存储设备并存储在第一存储设备上。 此外，来自第一和第二保留区域的数据被传送到第二存储设备并存储在第二存储设备上。 因此，在恢复正常操作时，如果其中一个群集随后无法恢复正常操作，则通过操作群集可以获得来自故障群集的数据。