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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0509484 (1990-04-16) |
| 발명자 / 주소 |
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| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 292 인용 특허 : 0 |
The parallel disk drive array data storage subsystem maps between virtual and physical data storage devices and schedules the writing of data to these devices. The data storage subsytem functions as a conventional large form factor disk drive memory, using an array of redundancy groups, each contain
The parallel disk drive array data storage subsystem maps between virtual and physical data storage devices and schedules the writing of data to these devices. The data storage subsytem functions as a conventional large form factor disk drive memory, using an array of redundancy groups, each containing N+M disk drives. A performance improvement is obtained by eliminating redundancy data updates in the redundancy group by writing modified virtual track instances into previously emptied logical tracks and marking the data contained in the previous virtual track instance location as invalid. Logical cylinders containing a mixture of valid and invalid virtual tracks are emptied by writing all the valid virtual tracks into a previously emptied logical cylinder as a background process.
A disk memory system for storing data records for at least one associated data processor comprising: a plurality of disk drives, a subset of said plurality of disk drives being configured into at lest two redundancy groups, each redundancy group consisting of at lest two disk drives; means, responsi
A disk memory system for storing data records for at least one associated data processor comprising: a plurality of disk drives, a subset of said plurality of disk drives being configured into at lest two redundancy groups, each redundancy group consisting of at lest two disk drives; means, responsive to the receipt of a stream of data records from said associated data processor, for selecting first available memory space in one of said redundancy groups to store said received stream of data records thereon; means for writing said received stream of data records and redundancy data associated with said received stream of data records in said selected first available memory space in said selected redundancy group; means, responsive to the subsequent receipt of modifications to one of said data records stored in said first available memory space in said selected redundancy group from said associated data processor, for writing said modified data record, exclusive of the rest of said received stream of data records and said redundancy data associated with said received stream of data records written in said first available memory space, in second available memory space in one of said redundancy groups by including said modified data record with a stream of data records subsequently received by said writing means; and means for converting said first available memory space used to store said originally received data record to available memory space.
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