US6151660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Information recording/reproducing apparatus having segmented cache memory
Assignee: Olympus Corp
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Filing: 1997-08-22
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Granted: 2000-11-21
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Expires: 2017-08-22
Abstract
Abstract An information recording/reproducing apparatus for recording or reproducing information on or from a recording medium comprises a segmented cache type cache memory having a storage area thereof divided into a plurality of segments and temporarily storing data to be transferred between an upper-level host computer and the recording medium in the segments, and a cache memory management unit for controlling reading or writing of data from or in the cache memory and for managing and retrieving data stored in the cache memory. The number of segments into which the storage area of the cache memory is divided is set on the basis of an optimal number of segments determined according to the conditions for an operation program and management data storage memory existent in the cache memory management unit. Moreover, the size of each segment is set to a value permitting the set number of segments according to the storage capacity of the cache memory.
Inventors
- 👤 Takashi Aoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:00
CPC Classifications
G; G06; G06F; G06F12/00; G06F12/02; G06F12/08; G06F12/0802; G06F12/0866; G06F2212/00; G06F2212/31; G06F2212/312
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
An information recording/reproducing apparatus for recording or reproducing information on or from a recording medium, comprising: a segmented cache type cache memory having a storage area thereof divided into a plurality of segments and temporarily storing data to be transferred between an upper-level host computer and a recording medium in said segments; and a cache memory managing means for controlling reading or writing of data from or in said cache memory and for managing said data, said cache memory managing means having an operation program, wherein the number of segments into which the storage area of said cache memory is divided is set based on an optimal number of segments based on performance of said operation program and management data storage memory existent in said cache memory managing means, and the size of each segment is set to a value permitting the set number of segments according to the storage capacity of said cache memory.
Claim 2
Dependent Claim
155 words
An information recording/reproducing apparatus for recording or reproducing information on or from a recording medium, comprising: a segmented cache type cache memory having a storage area thereof divided into a plurality of segments and temporarily storing data to be transferred between an upper-level host computer and a recording medium in said segments; and a cache memory managing means for controlling reading or writing of data from or in said cache memory and for managing said data, said cache memory managing means having an operation program, wherein the number of segments into which the storage area of said cache memory is divided is set based on an optimal number of segments based on performance of said operation program and management data storage memory existent in said cache memory managing means, and the size of each segment is set to a value permitting the set number of segments according to the storage capacity of said cache memory.
Claim 3
Dependent Claim
43 words
An information recording/reproducing apparatus according to claim 1, wherein the number of segments constituting said cache memory is set to a permissible maximum number of segments according to the storage capacity of said management data storage memory in said cache memory managing means.
Claim 4
Dependent Claim
71 words
An information recording/reproducing apparatus according to claim 1, wherein the storage area of said cache memory is divided into a plurality of segments so that the storage area has the set number of segments, the number of segments is fixed irrespective of whether the storage capacity of the storage area of said cache memory is large or small, and the size of each segment is set according to the storage capacity.
Claim 5
Dependent Claim
62 words
An information recording/reproducing apparatus according to claim 1, wherein the storage area of said cache memory is divided into a plurality of segments so that the storage area has the set number of segments, and the size of each segment is increased or decreased according to whether the storage capacity of the storage area of said cache memory is large or small.
References Cited (Backward Citations)
US4905141A
Cited
JPH02122345A
Cited
JPH03176726A
Cited
US5247653A
Cited
US5381533A
Cited
US5696698A
Cited
JPH08115169A
Cited
JPH08185271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-11-21 | 2004-05-22 | 2004-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-11-21 | 2008-05-22 | 2008-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-11-21 | 2012-05-22 | 2012-11-21 | $7700.00 | Window Closed / Lapsed |