RAID storage system with tandem operation using multiple...

Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition

Reexamination Certificate

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Details

C711S163000, C711S165000

Reexamination Certificate

active

07840756

ABSTRACT:
An improved RAID storage system adapted to selectively and automatically store the same data “in tandem” using two different storage profiles. In one embodiment, a first store operation occurs in accordance with first storage profile and, if a flag in the first storage profile is set, a second store operation automatically occurs in accordance with a second storage profile but with the same data as stored in the first store operation. The first and second storage profiles are stored sequentially in profile registers within a controller in the storage system. To speed the tandem operation, the data may be held in a re-readable FIFO buffer in the controller. The buffer is sized to hold the minimum size of data that can be stored to the physical disks in the storage system. Preferably, the size of the buffer is substantially equal to the minimum size.

REFERENCES:
patent: 7558931 (2009-07-01), Ishida et al.
patent: 2006/0085604 (2006-04-01), Guthrie et al.
patent: 2008/0282030 (2008-11-01), Kalwitz et al.
patent: 2009/0077333 (2009-03-01), Byrne et al.

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