Method for snooping raid 1 read transactions by a storage...

Details Method for snooping raid 1 read transactions by a storage... Method for snooping raid 1 read transactions by a storage...

2006-01-17

2006-01-17

Peugh, Brian R. (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S162000, C711S146000

Reexamination Certificate

active

06988166

ABSTRACT:
To implement a RAID 1 transaction, an initiator sends a single command, i.e., either a single read command, or a single write command, over a common I/O bus to a primary target device. A mirror target device snoops the common I/O bus and upon detecting the single command directed to the primary target device, effectively performs in the same manner as if the command had been directed to the mirror target device. Hence, a single command is used to effectuate a mirrored transaction.

REFERENCES:
patent: 6105118 (2000-08-01), Maddalozzo et al.
patent: 6721845 (2004-04-01), Clegg et al.
patent: 6763433 (2004-07-01), Arimilli et al.
patent: 6772189 (2004-08-01), Asselin
patent: 2003/0014520 (2003-01-01), Rinaldis et al.
Sahai, “Performance Aspects of RAID Architectures”, © 1997 IEEE, p. 321-327.

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