US5689481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of accessing multifile storage medium and library system
Assignee: Hitachi Ltd
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Filing: 1993-10-19
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Granted: 1997-11-18
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Expires: 2013-10-19
Abstract
Abstract A method of accessing a multifile storage medium and a library system. The library system includes recording/reproducing apparatuses for performing a recording/reproducing operation on the multifile storage medium, a plurality of recording/reproduction control units for controlling transaction of information with a host, a plurality of buffers provided between the recording/reproduction control units and the recording/reproducing apparatuses, a library control unit for controlling the whole library system, a directory for recording correspondence between the individual multifile recording media and a plurality of files stored therein, a shelf for housing the multifile storage media and handling devices. The plural buffers can be accessed independently of one another. Plural files are transferred between the buffers and the storage medium on a file-by-file basis. The access requests to the files are disposed of within the buffer.
Inventors
- 👤 Akiyori Tamura
- 👤 Kazuaki Tanaka
- 👤 Tatsuo Namba
- 👤 Naoki Hirosawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:38
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/22
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
176 words
A library system comprising: at least one portable multifile storage medium storing a plurality of files each file being managed with respective independent identification symbols; a shelf for housing multifile storage media; at least one storage medium driving means for performing an information recording/reproducing operation for said multifile storage medium; handling means for performing transportation of said multifile storage medium between said medium driving means and said shelf; control information storing means for recording control information indicating correspondence between said identification symbols and said multifile storage medium; control means for mounting/demounting said multifile storage medium on/from said storage medium driving means on the basis of an identification symbol received from a host system and said control information; and a plurality of buffers shared by said at least one storage medium driving means, said buffers being capable of being accessed independently of one another; wherein given one(s) of said plural files are transferred to the individual buffers on a file-by-file basis so that access requests for said plural files are disposed of in parallel with said buffers.
Claim 2
Dependent Claim
176 words
A library system comprising: at least one portable multifile storage medium storing a plurality of files each file being managed with respective independent identification symbols; a shelf for housing multifile storage media; at least one storage medium driving means for performing an information recording/reproducing operation for said multifile storage medium; handling means for performing transportation of said multifile storage medium between said medium driving means and said shelf; control information storing means for recording control information indicating correspondence between said identification symbols and said multifile storage medium; control means for mounting/demounting said multifile storage medium on/from said storage medium driving means on the basis of an identification symbol received from a host system and said control information; and a plurality of buffers shared by said at least one storage medium driving means, said buffers being capable of being accessed independently of one another; wherein given one(s) of said plural files are transferred to the individual buffers on a file-by-file basis so that access requests for said plural files are disposed of in parallel with said buffers.
Claim 3
Dependent Claim
61 words
A library system according to claim 1, further comprising: means for optimizing said plurality of access requests so that said plural access requests conform to a physical sequence in which said plural files stored in said multifile storage medium are accessed by suspending correspondingly a plurality of access requests for a plurality of said files stored in said multifile storage medium.
Claim 4
Dependent Claim
28 words
A library system according to claim 2, wherein said control information stored in said control information storage means is recorded on a portion of said multifile storage medium.
Claim 5
Dependent Claim
22 words
A library system according to claim 3, wherein said multifile storage medium is a helical scan magnetic tape or an optical disk.
Claim 6
Dependent Claim
23 words
A library system according to claim 2, where n said multifile storage medium is a helical scan magnetic tape or an optical disk.
Claim 7
Dependent Claim
28 words
A library system according to claim 1, wherein said control information stored in said control information storage means is recorded on a portion of said multifile storage medium.
Claim 8
Dependent Claim
22 words
A library system according to claim 6, wherein said multifile storage medium is a helical scan magnetic tape or an optical disk.
Claim 9
Dependent Claim
22 words
A library system according to claim 1, wherein said multifile storage medium is a helical scan magnetic tape or an optical disk.
Claim 10
Dependent Claim
180 words
A library system, comprising: at least one portable multifile storage medium storing a plurality of files, each file being managed with respective independent identification symbols; a shelf for housing a plurality of multifile storage media; at least one storage medium driving means for performing an information recording/reproducing operation for said multifile storage medium; handling means for performing transportation of said multifile storage medium between said medium driving means and said shelf; control information storing means for recording control information indicating correspondence between said identification symbols and said multifile storage medium; control means for controlling said handling means to effect mounting/demounting of said multifile storage medium on/from said storage medium driving means on the basis of an identification symbol received from a host system and said control information; and means for optimizing said plurality of access requests so that said plural access requests conform to a physical sequence in which said plural files stored in said multifile storage medium are accessed by suspending correspondingly a plurality of access requests for a plurality of said files stored in said multifile storage medium.
Claim 11
Dependent Claim
180 words
A library system, comprising: at least one portable multifile storage medium storing a plurality of files, each file being managed with respective independent identification symbols; a shelf for housing a plurality of multifile storage media; at least one storage medium driving means for performing an information recording/reproducing operation for said multifile storage medium; handling means for performing transportation of said multifile storage medium between said medium driving means and said shelf; control information storing means for recording control information indicating correspondence between said identification symbols and said multifile storage medium; control means for controlling said handling means to effect mounting/demounting of said multifile storage medium on/from said storage medium driving means on the basis of an identification symbol received from a host system and said control information; and means for optimizing said plurality of access requests so that said plural access requests conform to a physical sequence in which said plural files stored in said multifile storage medium are accessed by suspending correspondingly a plurality of access requests for a plurality of said files stored in said multifile storage medium.
Claim 12
Independent Claim
144 words
A method of accessing portable multifile storage media from a shelf, each multifile storage medium storing a plurality of individual files, said files each having respective independent identification symbols, comprising the steps of: storing correspondence relations between an identification symbol of each file and the medium in which said files are stored; loading, upon receiving a movement instruction indicative of a file designation from one or more host computers, a medium having the designated file or files stored therein into a driving means for performing a recording/reproducing operation for a portable multifile storage medium; transferring individual files stored in said loaded medium on a file-by-file basis between said multifile storage medium and a plurality of buffers which can be accessed independently of one another; and processing access requests from said one or more host computers to said individual files in parallel within said buffers.
Claim 13
Independent Claim
144 words
A method of accessing portable multifile storage media from a shelf, each multifile storage medium storing a plurality of individual files, said files each having respective independent identification symbols, comprising the steps of: storing correspondence relations between an identification symbol of each file and the medium in which said files are stored; loading, upon receiving a movement instruction indicative of a file designation from one or more host computers, a medium having the designated file or files stored therein into a driving means for performing a recording/reproducing operation for a portable multifile storage medium; transferring individual files stored in said loaded medium on a file-by-file basis between said multifile storage medium and a plurality of buffers which can be accessed independently of one another; and processing access requests from said one or more host computers to said individual files in parallel within said buffers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-11-17 | 2001-05-19 | 2001-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-17 | 2005-05-19 | 2005-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-17 | 2009-05-19 | 2009-11-18 | $7700.00 | Window Closed / Lapsed |