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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0586796 (1990-09-24) |
| 발명자 / 주소 |
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| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 426 인용 특허 : 0 |
An apparatus and method for disk mapping and data retrieval includes a data storage medium on which has been stored a plurality of data records. Each record includes at least a record identification portion, for uniquely identifying each record from among the plurality of data records. The apparatus
An apparatus and method for disk mapping and data retrieval includes a data storage medium on which has been stored a plurality of data records. Each record includes at least a record identification portion, for uniquely identifying each record from among the plurality of data records. The apparatus builds a record locator table and high speed semiconductor memory which comprises the unique record identifiers for the records on the storage medium as well as a record locator index generated by the apparatus, which indicates the address of the data record on the storage medium. Data retrieval is facilitated by first searching the record locator table in high speed semiconductor memory for a requested data record. Utilizing the record locator index associated with the reqested data record, the system directly accesses the requested data record on the storage medium thereby minimizing storage medium search time. Also disclosed is an apparatus and method for converting CKD formatted data records to FBA formatted disk drives and for building and compressing the “count”portion of the CKD data formatted record into a record locator table.
Apparatus for retrieving at least one requested data record stored on a storage medium comprising: means for receiving a plurality of data records, each of said data records including at least a record identification portion and a data portion; means, responsive to said means for receiving, for tran
Apparatus for retrieving at least one requested data record stored on a storage medium comprising: means for receiving a plurality of data records, each of said data records including at least a record identification portion and a data portion; means, responsive to said means for receiving, for transferring and storing said plurality of data records on at least one of said storage mediums; means, responsive to said means for transferring and storing, for generating a corresponding plurality of recording locator indices, each of said corresponding plurality of record locator indices associated with one of said plurality of data records and a corresponding recording identification portion, for uniquely identifying the location of each of said plurality of data records stored on said at least one of said storage mediums; memory storage means, for storing at least said plurality of record locator indices and the associated record identification portions in one record locator table; means for requesting access to one or more of said plurality of data records, and for providing the data identification portion corresponding to said at least one requested data record; means, responsive to said means for requesting access, for searching said record locator table stored in said memory storage means, for locating said data record identification portion and associated one or more record locator indices corresponding to said at least one requested data record; and record retrieval means, responsive to said means for searching, for directly retrieving from said at least one storage medium said at least one requested data record as directed by said associated record locator indices.
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