Method and apparatus for enhancing operations in disk array...

Details Method and apparatus for enhancing operations in disk array... Method and apparatus for enhancing operations in disk array...

2006-01-03

2006-01-03

Padmanabhan, Mano (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S141000, C711S148000, C711S152000, C711S167000

Reexamination Certificate

active

06983353

ABSTRACT:
A method and apparatus for assuring data consistency during certain operations involving dependent input/output sequences. During such operations a stall application blocks write operations to specified logical devices in a local consistency group while allowing read operations to all devices and write operations to non-specified logical devices. When a write command is directed to a logical device in local consistency group, the host adapter associated with the logical device returns a message to the host that initiates a write command retry. Retries generally continue until a write command is successful.

REFERENCES:
patent: 6101497 (2000-08-01), Ofek
patent: 6370626 (2002-04-01), Gagne et al.
patent: 6785793 (2004-08-01), Aboulenein et al.
patent: 2001/0021967 (2001-09-01), Tetrick

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