US5890202A
Expired / Lapsed
US
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Method of accessing storage units using a schedule table having free periods corresponding to data blocks for each storage portion
Assignee: Fujitsu Ltd
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Filing: 1995-11-28
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Granted: 1999-03-30
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Expires: 2015-11-28
Abstract
Abstract A method is disclosed of accessing a storage device in which each sequence of data is divided into a unit data for distributively to be stored in a plurality of storage units and the stored unit data is sequentially read out. A schedule table is provided for managing access stuations to each of storage portions of a storage device for each unit data, and further a blank interval which corresponds to one unit data is sequentially provided with a storage area for storing accessing status to each storage portion in the schedule table. For example, when a request to change the order of accessing a sequence of data is issued, the order of accessing a sequence of data can be changed with ease by writing a name of the user who issued the request to change, then followed by sequentially writing the name of the user in a blank area which corresponds to storage portions to be accessed next.
Inventors
- 👤 Ryuta Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:47
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/06; G06F3/0601; G06F3/0602; G06F3/061; G06F13/00; G06F13/38; G06F13/382; G06F13/385; G06F3/0628; G06F3/0638; G06F3/064; G06F3/0668; G06F3/0671; G06F3/0683; G06F3/0689
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
124 words
A controlling unit for use with a storage unit for dividing a plurality of types of data sequences into data blocks and distributively writing the data blocks to a plurality of storage portions of the storage unit or successively reading each of the data blocks of the data sequence from the storage portions, comprising: a schedule table for managing access situations of the storage portions of the storage unit for each of the data blocks; and access control means for causing an area for storing access situations of the storage portions to have respective free periods corresponding to data blocks and for changing an access destination using the free periods of the storage portions when a schedule changing request is issued from a user.
Claim 2
Dependent Claim
124 words
A controlling unit for use with a storage unit for dividing a plurality of types of data sequences into data blocks and distributively writing the data blocks to a plurality of storage portions of the storage unit or successively reading each of the data blocks of the data sequence from the storage portions, comprising: a schedule table for managing access situations of the storage portions of the storage unit for each of the data blocks; and access control means for causing an area for storing access situations of the storage portions to have respective free periods corresponding to data blocks and for changing an access destination using the free periods of the storage portions when a schedule changing request is issued from a user.
Claim 3
Dependent Claim
138 words
The control unit as set forth in claim 1, wherein the schedule table comprises: a first area for storing storage portion representing information that designates one of the storage portions; a second area for storing an access request source; and a third area for storing storage position information that represents a storage position of the data block in the storage portion, and wherein said access control means is adapted for writing the storage position representing information of each of the storage portions to the first area and writing at least information that represents a free state to the second area so as to provide each storage portion with a free period corresponding to one data block and for successively designating free storage portions on the schedule table as new access destinations when the schedule changing request is issued.
Claim 4
Dependent Claim
35 words
The control unit as set forth in claim 1, wherein said access control means is adapted for executing other than an access control process for the storage portions using free periods of the schedule table.
Claim 5
Dependent Claim
202 words
A control unit for use with a storage unit for dividing a plurality of types of data sequences into data blocks and distributively writing the data blocks to a plurality of storage portions of the storage unit or successively reading each of the data blocks of the data sequence from the storage portions, comprising: a schedule table for managing access situations of the storage portions of the storage unit for each of the data blocks; and access control means for causing an area for storing access situations of the storage portions to have respective free periods corresponding to data blocks and for changing an access destination using the free periods of the storage portions when a schedule changing request is issued from a user; wherein said access control means is adapted for determining whether or not a storage portion as an access destination is the free period when the schedule changing request for changing the access order of the data sequence or for accessing another data sequence is issued, and wherein said access control means is adapted for designating the free storage portion as the next access destination for the user when the storage portion of the desired access destination is free.
Claim 6
Dependent Claim
202 words
A control unit for use with a storage unit for dividing a plurality of types of data sequences into data blocks and distributively writing the data blocks to a plurality of storage portions of the storage unit or successively reading each of the data blocks of the data sequence from the storage portions, comprising: a schedule table for managing access situations of the storage portions of the storage unit for each of the data blocks; and access control means for causing an area for storing access situations of the storage portions to have respective free periods corresponding to data blocks and for changing an access destination using the free periods of the storage portions when a schedule changing request is issued from a user; wherein said access control means is adapted for determining whether or not a storage portion as an access destination is the free period when the schedule changing request for changing the access order of the data sequence or for accessing another data sequence is issued, and wherein said access control means is adapted for designating the free storage portion as the next access destination for the user when the storage portion of the desired access destination is free.
Claim 7
Independent Claim
170 words
A method of accessing a storage unit for dividing each of a plurality of types of data sequences into data blocks, for sequentially writing the divided data blocks to a plurality of storage portions, and for sequentially reading the data blocks of the plurality of types of data sequences from the plurality of storage portions, the method comprising the steps of: providing a schedule table for managing access situations for the plurality of storage portions; sequentially providing a free period corresponding to each of the data blocks for each of the plurality of storage portions, in an area storing a request source of each of the plurality of storage portions in the schedule table; and referencing the schedule table and changing an access destination by using the free period corresponding to each of the plurality of storage portions in the schedule table according to an access change request, when the access change request for changing an access order of a data sequence or for accessing another data sequence is made.
Claim 8
Independent Claim
170 words
A method of accessing a storage unit for dividing each of a plurality of types of data sequences into data blocks, for sequentially writing the divided data blocks to a plurality of storage portions, and for sequentially reading the data blocks of the plurality of types of data sequences from the plurality of storage portions, the method comprising the steps of: providing a schedule table for managing access situations for the plurality of storage portions; sequentially providing a free period corresponding to each of the data blocks for each of the plurality of storage portions, in an area storing a request source of each of the plurality of storage portions in the schedule table; and referencing the schedule table and changing an access destination by using the free period corresponding to each of the plurality of storage portions in the schedule table according to an access change request, when the access change request for changing an access order of a data sequence or for accessing another data sequence is made.
Claim 9
Dependent Claim
141 words
The method of accessing the storage unit as set forth in claim 5, further comprising the steps of: storing storage portion designation information indicating one of the plurality of storage portions in a first area in the schedule table; storing an access request source for each of the plurality of storage portions and sequentially providing a free period corresponding to each of the plurality of storage portion in a second area in the schedule table; and storing storage location information indicating a storage location in a storage portion storing a data block in a third area in the schedule table; designating a corresponding storage portion specified by information of the first area corresponding to a storage area having the free period in the second area in the schedule table, as a next access destination when a schedule change request is made.
Claim 10
Dependent Claim
70 words
The method of accessing the storage unit as set forth in claim 6, further comprising the steps of: collecting information necessary for accessing the next data block bases on the information of the first area, the second area, and the third area of the schedule table; and storing the collected information to the first area, the second area, and the third area that are accessed in the next access period.
Claim 11
Dependent Claim
74 words
The method of accessing the storage unit as set forth in claim 5, which further includes the steps of: changing an access destination using a free period of each of the storage portions and reading a desired data block from the changed access destination when the schedule changing request is issued from a user; and sending the data block through a first-in-first-out type of buffer memory at a transmission speed designated by the user.
Claim 12
Dependent Claim
36 words
The method of accessing the storage unit as set forth in claim 5, further comprising the step of: executing other than an access control process for the storage portions in free periods of the schedule table.
Claim 13
Independent Claim
260 words
A method of accessing a storage unit for dividing each of a plurality of types of data sequences into data blocks, for sequentially writing the divided data blocks to a plurality of storage portions, and for sequentially reading the data blocks of the plurality of types of data sequences from the plurality of storage portions, the method comprising the steps of: providing a schedule table for managing access situations for the plurality of storage portions; sequentially providing a free period corresponding to each of the data blocks for each of the plurality of storage portions, in an area storing a request source of each of the plurality of storage portions in the schedule table; referencing the schedule table and changing an access destination by using the free period corresponding to each of the plurality of storage portions in the schedule table according to an access change request, when the access change request for changing an access order of a data sequence or for accessing another data sequence is made; referencing the schedule table and determining whether or not a storage portion of an access destination corresponding to the schedule changing request is the free period when the schedule changing request for changing the access order of a data sequence or for accessing another type of a data sequence is issued; and designating the free storage portion as a next access destination for the schedule changing request of a user and designating next free storage portions as next access destinations when the storage portion of a desired access destination is free.
Claim 14
Independent Claim
260 words
A method of accessing a storage unit for dividing each of a plurality of types of data sequences into data blocks, for sequentially writing the divided data blocks to a plurality of storage portions, and for sequentially reading the data blocks of the plurality of types of data sequences from the plurality of storage portions, the method comprising the steps of: providing a schedule table for managing access situations for the plurality of storage portions; sequentially providing a free period corresponding to each of the data blocks for each of the plurality of storage portions, in an area storing a request source of each of the plurality of storage portions in the schedule table; referencing the schedule table and changing an access destination by using the free period corresponding to each of the plurality of storage portions in the schedule table according to an access change request, when the access change request for changing an access order of a data sequence or for accessing another data sequence is made; referencing the schedule table and determining whether or not a storage portion of an access destination corresponding to the schedule changing request is the free period when the schedule changing request for changing the access order of a data sequence or for accessing another type of a data sequence is issued; and designating the free storage portion as a next access destination for the schedule changing request of a user and designating next free storage portions as next access destinations when the storage portion of a desired access destination is free.
Claim 15
Independent Claim
306 words
A method of accessing a storage unit for dividing each of a plurality of types of data sequences into data blocks, for sequentially writing the divided data blocks to a plurality of storage portions, and for sequentially reading the data blocks of the plurality of types of data sequences from the plurality of storage portions, the method comprising the steps of: providing a schedule table for managing access situations for the plurality of storage portions; sequentially providing a free period corresponding to each of the data blocks for each of the plurality of storage portions, in an area storing a request source of each of the plurality of storage portions in the schedule table; referencing the schedule table and changing an access destination by using the free period corresponding to each of the plurality of storage portions in the schedule table according to an access change request, when the access change request for changing an access order of a data sequence or for accessing another data sequence is made; referencing the schedule table and determining whether or not a storage portion of an access destination corresponding to the schedule changing request is the free period when the schedule changing request for changing the access order of a data sequence or for accessing another type of a data sequence is issued; designating the free storage portion as a next access destination for the schedule changing request of a user and designating next free storage portions as next access destinations when the storage portion of a desired access destination is free; and designating a free storage portion for storing a data block separated by a predetermined number of data blocks from the first data block corresponding to the schedule changing request as the next access destination when the storage portion of the desired access destination is not free.
Claim 16
Independent Claim
306 words
A method of accessing a storage unit for dividing each of a plurality of types of data sequences into data blocks, for sequentially writing the divided data blocks to a plurality of storage portions, and for sequentially reading the data blocks of the plurality of types of data sequences from the plurality of storage portions, the method comprising the steps of: providing a schedule table for managing access situations for the plurality of storage portions; sequentially providing a free period corresponding to each of the data blocks for each of the plurality of storage portions, in an area storing a request source of each of the plurality of storage portions in the schedule table; referencing the schedule table and changing an access destination by using the free period corresponding to each of the plurality of storage portions in the schedule table according to an access change request, when the access change request for changing an access order of a data sequence or for accessing another data sequence is made; referencing the schedule table and determining whether or not a storage portion of an access destination corresponding to the schedule changing request is the free period when the schedule changing request for changing the access order of a data sequence or for accessing another type of a data sequence is issued; designating the free storage portion as a next access destination for the schedule changing request of a user and designating next free storage portions as next access destinations when the storage portion of a desired access destination is free; and designating a free storage portion for storing a data block separated by a predetermined number of data blocks from the first data block corresponding to the schedule changing request as the next access destination when the storage portion of the desired access destination is not free.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-03-29 | 2002-09-28 | 2003-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-29 | 2006-09-28 | 2007-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-29 | 2010-09-28 | 2011-03-30 | $7700.00 | Window Closed / Lapsed |