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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0052039 (1993-04-23) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 905 인용 특허 : 0 |
A data storage system which automatically provides and maintains identical secondary data on a preferably geographically remote secondary data storage device. The system includes a primary host computer located in the first geographic location which is coupled to a primary data storage system also l
A data storage system which automatically provides and maintains identical secondary data on a preferably geographically remote secondary data storage device. The system includes a primary host computer located in the first geographic location which is coupled to a primary data storage system also located in the first geographic location. The primary data storage system includes at least one primary data storage device on which primary data is to be stored, and a primary data storage system controller which receives data from the primary host computer and controls the storing of the primary data on the primary data storage device. The primary data storage controller is coupled by high speed communication link to a secondary data storage system controller of a secondary data storage system, and coordinates the copying of the primary data to the secondary data storing system, and is responsive to an acknowledgement from the secondary data storage system controller of at least successful receipt of the primary data for updating the maintained list of the primary data to indicate that the copied primary data has been received by the secondary data storage system to be copied to the secondary data storage device.
A system for automatically providing and maintaining data, said system comprising: a host computer located in a first geographic location; a first data storage system located in a first geographic location and coupled to said host computer, for storing data to be accessed by at least said host compu
A system for automatically providing and maintaining data, said system comprising: a host computer located in a first geographic location; a first data storage system located in a first geographic location and coupled to said host computer, for storing data to be accessed by at least said host computer; a second data storage system located in a second geographic location geographically remote from said first location, coupled to said first data storage system, for receiving at least data from said first data storage system; and said first data storage system enabling transfer of said data to said second data storage system, concurrently with said data received from said host computer, so as to nearly simultaneously maintain a concurrent copy of data stored on said first data storage system and on said second data storage system wherein both said first and said second data storage systems maintain an index, said index including at least a first indicator providing an indication of whether a predetermined data element stored on said first data storage system is valid, and at least a second indicator providing an indication of whether said predetermined data element stored on said second data storage system is valid.
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