Disk array controller capable of preventing data distortion caused by an interruption of data write operation
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Sep 2, 1997
Issued Date -
N/A
app pub date -
May 16, 1995
filing date -
Jan 21, 1992
priority date (Note) -
In Force
status (Latency Note)
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Importance

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Abstract
A disk array controller is connected to both a host computer and a plurality of disk drives operating in parallel. The disk array controller is responsive to an output request from the host computer for dividing data supplied from the host computer and parallel writing the divided data in the plurality of disk drives. In response to an input request from the host computer, the disk array controller combines data parallelly read from the disk drives into a set of data. Responsive to the output request, a processor stores in a non-volatile memory a write status of each block within a data write area for each disk drive to which data is to be written. The write status includes a first status representing a write completed status of each disk drive, a second status representing a writing status of each disk drive, and a third status representing a no write indication status of each disk drive.
First Claim
all claims..Other Claims data not available
Family
Country | kind | publication No. | Filing Date | Type | Sub-Type |
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JP | B2 | JP3058743 | Jan 21, 1992 | Patent | Grant |
Type : Patent Sub-Type : Grant | |||||
PUBLISHED GRANTED PATENT (SECOND LEVEL) | DISK ARRAY CONTROLLER | Jul 04, 2000 | |||
US | A | US5550975 | Jan 19, 1993 | Patent | Grant |
Type : Patent Sub-Type : Grant | |||||
PATENT | Disk array controller | Aug 27, 1996 |
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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HITACHI LTD | 6-6 MARUNOUCHI 1-CHOME CHIYODA-KU TOKYO 100-8280 |
International Classification(s)

- 1995 Application Filing Year
- G06F Class
- 8529 Applications Filed
- 5482 Patents Issued To-Date
- 64.28 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Ichinomiya, Hiroshi | Kawasaki, JP | 12 | 145 |
# of filed Patents : 12 Total Citations : 145 | |||
Satoh, Takao | Sagamihara, JP | 74 | 1974 |
# of filed Patents : 74 Total Citations : 1974 | |||
Yamamoto, Akira | Sagamihara, JP | 924 | 13286 |
# of filed Patents : 924 Total Citations : 13286 |
Cited Art Landscape
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Patent Citation Ranking
- 28 Citation Count
- G06F Class
- 56.15 % this patent is cited more than
- 28 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

Legal Events
Date | Code | Event | Description |
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Oct 26, 2015 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Sep 25, 2015 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Sep 25, 2015 |
Sep 25, 2015 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | |
May 08, 2015 | REMI | MAINTENANCE FEE REMINDER MAILED | |
Feb 24, 2011 | FPAY | FEE PAYMENT | year of fee payment: 4 |
Sep 25, 2007 | I | Issuance | |
Sep 08, 2005 | P | Published | |
Dec 16, 2004 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIRIYAMA, HIROMITSU;YAMAKAWA, KOICHI;REEL/FRAME:016140/0408 Owner name: JAPAN ATOMIC ENERGY RESEARCH INSTITUTE, JAPAN Effective Date: Dec 16, 2004 |
Aug 27, 2004 | F | Filing | |
Mar 04, 2004 | PD | Priority Date |

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