Method, system, and program for accessing data from storage...

Details Method, system, and program for accessing data from storage... Method, system, and program for accessing data from storage...

2006-05-02

2006-05-02

Ali, Mohammad (Department: 2177)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000, C711S166000

Reexamination Certificate

active

07039657

ABSTRACT:
Disclosed is a system, method, and program for accessing a data set, e.g., volume, file, from one of two storage devices. Each storage device includes a copy of the data set. A flag is maintained for each storage device indicating whether a previous access attempt of the data set from the storage device failed. The storage device having the flag indicating that no previous access attempt failed is selected if the flag for the other storage device indicates that one previous access attempt of the data set from the storage device failed. The data set is accessed from the selected storage device.

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Weikum et al., “Dynamic file allocation in disk arrays”, 1991, ACM Press NY, USA, pp. 406-415.

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