Methods and apparatus for point-in-time volumes

Details Methods and apparatus for point-in-time volumes Methods and apparatus for point-in-time volumes

2011-08-30

2011-08-30

Bradley, Matthew (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S162000, C707S641000, C707S646000

Reexamination Certificate

active

08010756

ABSTRACT:
Methods and apparatus for point-in-time volumes are provided. A relationship is enabled between a source volume and point-in-time volume. Copying a data chunk to the point-in-time volume before a write operation modifies the data chunk on the source volume dynamically creates the point-in-time volume. The point-in-time volume can be accessed in read/write mode as a general purpose data storage volume. Other embodiments comprising additional features, such as a forced migration process, are also provided.

REFERENCES:
patent: 5913215 (1999-06-01), Rubinstein et al.
patent: 6366986 (2002-04-01), St. Pierre et al.
patent: 6397308 (2002-05-01), Ofek et al.
patent: 6651075 (2003-11-01), Kusters et al.

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