FIFO-based operations for redundant array of independent disks (RAID) device
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United States of America Patent
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Jan 9, 2018
Issued Date -
N/A
app pub date -
Mar 3, 2016
filing date -
Jan 8, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
Apparatuses and methods for modifying data stored on a disk are provided. A buffer comprises a FIFO queue. The FIFO queue includes a plurality of buffer lines for queuing data units in a predetermined order. A controller is configured to write data units from the disk to respective buffer lines of the FIFO queue. The controller is further configured to perform read-modify-write (RMW) operations to modify the data units written to the queue. Each RMW operation includes (i) popping a data unit from a buffer line of the queue based on a location of a read pointer, (ii) performing a mathematical or logic operation to modify the data unit that is popped from the queue, and (iii) pushing the modified data unit into the queue. The modified data unit is written to a buffer line of the queue based on a location of a write pointer.
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