Recording device having short data writing time

Details Recording device having short data writing time Recording device having short data writing time

G - Physics

06

F

G06F 11/08 (2006.01) G06F 11/10 (2006.01) G11C 29/00 (2006.01) G06F 11/20 (2006.01) G06F 11/22 (2006.01)

Patent

CA 2065832

A recording device which improves a response time to write data by reporting to a host computer the completion of writing operation prior to the completion of writing redundancy data. Data writing command information from the host computer is stored in a command/status memory backed up by a power source in an array controller, and the completion of writing operation is reported to the host computer at the time of the completion of writing updated data prior to the completion of writing redundancy data. Redundancy data is written as a background process. If redundancy data could not be written due to any abnormality of the power source or the like, such redundancy data may be generated from the data in other disk units of the same redundancy group in accordance with writing command information stored in the command/status memory, thereby completing the writing of redundancy data.

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