Disk controller providing for the auto-transfer of host-requested-data from a cache memory within a disk memory system
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United States of America Patent
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Mar 15, 2011
Grant Date -
Dec 3, 2009
app pub date -
Aug 13, 2009
filing date -
Dec 15, 2000
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Abstract
A disk-controller (110) that is within a disk memory system (100) initiates the auto-transfer of host-requested-data from cache memory (120) without the intervention of a microprocessor (130) that is within the disk memory system. The system performs auto-transfer, without the intervention of the microprocessor, even when the first block of host-requested-data (301) is not within cache memory (311). The system includes disk-controller circuitry (11) that determines when at least a portion of the host-requested-data is somewhere within cache memory. When only a portion of the host-requested-data is found within cache memory, and the first block of host-requested-data is not the first block of data within cache memory, the circuitry (112) generates a new Cache-Counter-Value, a new Cache-Pointer-Value and a new Cache-Start-Address value, which new values are used to initiate the auto-transfer of this cache-resident-portion of the host-requested-data from cache memory, as the power of the microprocessor is concurrently used to fetch the missing host-requested-data from a magnetic disk device (140).
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- 15 United States
- 10 France
- 8 Japan
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Patent Owner(s)
- STMICROELECTRONICS NV
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Allen, Ali | Longmont, US | 2 | 12 |
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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 |
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