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US5889795A
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Disk array system and method for storing data
Assignee: International Business Machines Corp
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Filing: 1997-03-10
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Granted: 1999-03-30
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Expires: 2017-03-10
Abstract
Abstract A system is provided for improving the speed for writing data in a disk array system. The disk array system includes a solid state disk storage device configured with semiconductor flash memory to sequentially store the parity for the disk array. The solid state disk storage device allows data sectors to be assigned sequentially in a cluster consisting of a set of blocks. Each block is a physical unit of erasure. Write operations for a plurality of sectors are written across the set of blocks in the cluster.
Inventors
- 👤 Hideto Niijima
- 👤 Nobuyuki Matsuo
- 👤 Mayumi Shimada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:36
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/08; G06F11/10; G06F11/1076
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
85 words
A disk array system comprising a solid state disk storage device configured with semiconductor flash memory to centrally store parity, the solid state disk storage device allowing data sectors to be assigned sequentially in a cluster consisting of a set of blocks each block being a physical unit of erasure and sequential write operations in said data sectors across a plurality of blocks in the cluster start within each block at predetermined time intervals in response to a write command for a plurality of sectors.
Claim 2
Dependent Claim
85 words
A disk array system comprising a solid state disk storage device configured with semiconductor flash memory to centrally store parity, the solid state disk storage device allowing data sectors to be assigned sequentially in a cluster consisting of a set of blocks each block being a physical unit of erasure and sequential write operations in said data sectors across a plurality of blocks in the cluster start within each block at predetermined time intervals in response to a write command for a plurality of sectors.
Claim 3
Dependent Claim
18 words
The disk array system according to claim 1 wherein said blocks each belongs to separate semiconductor flash memory.
Claim 4
Dependent Claim
22 words
The disk array system according to claim 1 further comprising a cluster buffer which has capacity equivalent to that of said cluster.
Claim 5
Dependent Claim
20 words
The disk array system according to claim 3 wherein said cluster buffer stores the latest data written in the cluster.
Claim 6
Dependent Claim
64 words
A solid state disk storage device for a disk array system comprising: at least one cluster of blocks each block being a physical unit of erasure, and each block comprising a set of sectors for storing data; and a controller writing sectors of data across the cluster of blocks such that multiple data sectors are written to separate blocks during a single time period.
Claim 7
Dependent Claim
64 words
A solid state disk storage device for a disk array system comprising: at least one cluster of blocks each block being a physical unit of erasure, and each block comprising a set of sectors for storing data; and a controller writing sectors of data across the cluster of blocks such that multiple data sectors are written to separate blocks during a single time period.
Claim 8
Dependent Claim
29 words
The solid state disk storage device according to claim 5, wherein a new sector of data is stored sequentially within each block following a last sector having stored data.
Claim 9
Dependent Claim
56 words
The solid state disk storage device of claim 5 further comprising: a plurality of semiconductor flash memory units wherein each cluster comprises at least two blocks on separate memory units; a plurality of timers, at least one timer for each block in the cluster, for determining that the writing of a sector of data has completed.
Claim 10
Dependent Claim
73 words
A disk array system comprising: a plurality of storage devices for storing data; and a solid state disk storage device comprising: at least one cluster or blocks, each block being a physical unit of erasure, and each block comprising a set of sectors for storing data; and a controller writing sectors of data across the cluster of blocks such that multiple data sectors are written to separate blocks during a single time period.
Claim 11
Dependent Claim
73 words
A disk array system comprising: a plurality of storage devices for storing data; and a solid state disk storage device comprising: at least one cluster or blocks, each block being a physical unit of erasure, and each block comprising a set of sectors for storing data; and a controller writing sectors of data across the cluster of blocks such that multiple data sectors are written to separate blocks during a single time period.
Claim 12
Dependent Claim
22 words
The disk array system according to claim 8, further comprising a cluster buffer which has capacity equivalent to that of said cluster.
Claim 13
Dependent Claim
20 words
The disk array system according to claim 9 wherein said cluster buffer stores the latest data written in the cluster.
References Cited (Backward Citations)
US5222046A
Cited
GB2215156A
Cited
US5124987A
Cited
US5524230A
Cited
EP0522780A2
Cited
JPH05165577A
Cited
JPH05224832A
Cited
JPH05233155A
Cited
US5412661A
Cited
US5416915A
Cited
US5463765A
Cited
US5583876A
Cited
US5537567A
Cited
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 |