Storage device with write barrier sensitive write commands...

Details Storage device with write barrier sensitive write commands... Storage device with write barrier sensitive write commands...

2011-08-23

2011-08-23

Bragdon, Reginald G (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711SE12070

Reexamination Certificate

active

08006047

ABSTRACT:
The invention is a storage device which implements a write barrier command and provides means for a host to designate other write commands as being sensitive or insensitive to the existence of write barrier commands. The device can optimize the execution of commands by changing the order of execution of write commands that are insensitive to write barrier command. In an embodiment of the invention a flag associated with the write command indicates whether the command is sensitive or insensitive to the existence of write barrier commands. In an embodiment of the invention the write barrier command can be implemented as a write command with a flag that indicates whether the command is a write barrier command. In one embodiment of the invention the queue of commands and data to be written to the media is stored in a non-volatile cache.

REFERENCES:
patent: 6490642 (2002-12-01), Thekkath et al.
patent: 2005/0149589 (2005-07-01), Bacon et al.
patent: 2006/0020766 (2006-01-01), Dussud
patent: 2006/0106980 (2006-05-01), Kobayashi et al.
patent: 2006/0190510 (2006-08-01), Gabryjelski et al.
patent: 2007/0168626 (2007-07-01), De Souza
patent: 2007/0203960 (2007-08-01), Guo

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