Daisy-chained device-mirroring architecture

Details Daisy-chained device-mirroring architecture Daisy-chained device-mirroring architecture

2007-01-16

2007-01-16

Verbrugge, Kevin (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S162000, C714S006130, C714S006130

Reexamination Certificate

active

10787161

ABSTRACT:
A method of operating a daisy-chained device-mirroring architecture (where such an architecture may include a storage node N configured to mirror data on an entity representing node N−1, a storage node N+1 daisy-chain-coupled via a first main link to, and configured to mirror data on, the node N, and a storage node N+2 daisy-chain-coupled via a second main link to, and configured to mirror data on, the node N+1, each of the nodes N and N+1 being operable under normal circumstances to forward writes received thereby to the nodes N+1 and N+2 via the first and second main links, respectively), where such a method may include: tracking, at the node N, acknowledgments by the node N+1 and by the node N+2 of writes that the node N has forwarded.

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