发明名称 |
Transferring data in a digital data processing system. |
摘要 |
<p>A method and apparatus for transferring data between two storage media, and is used in an illustrative embodiment to transfer data between two storage media in a shadow set, the storage media being accessible to one or more host processors. The method of the preferred embodiment includes the steps of: A. receiving a command from one of the host processors, the command specifying data to be transferred from a first storage medium to a second storage medium; B. transferring the data specified in the command received from the host from the first storage medium to the second storage medium in a series of subtransfers, each of the subtransfers transferring a portion of the data; and C. processing one or more I/O requests to the shadow set received from one or more host processors by, for each received I/O request: a. implementing the I/O request if the I/O request does not involve a section of the shadow set currently involved in one of the subtransfers; and b. stalling the I/O request if the I/O request involves a section of said shadow set currently involved in one of the subtransfers, and implementing the I/O request when the subtransfer has completed.</p> |
申请公布号 |
EP0405861(A2) |
申请公布日期 |
1991.01.02 |
申请号 |
EP19900306859 |
申请日期 |
1990.06.22 |
申请人 |
DIGITAL EQUIPMENT CORPORATION |
发明人 |
DAVIS, SCOTT H.;GOLEMAN, WILLIAM L.;ZAHROBSKY, JAMES A.;THIEL, DAVID W.;BEAN, ROBERT G. |
分类号 |
G06F15/16;G06F11/14;G06F11/16;G06F11/20;G06F15/177 |
主分类号 |
G06F15/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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