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Patent Title: Method and apparatus for accessing mirrored logical volumes

Assignee: IBM
Patent Number: US6216211
Issue Date: 04-10-2001
Application Number:
File Date:06-13-1997

Abstract: A system and method for managing mirrored logical volumes are provided wherein a user designates one mirror of a given logical volume, having a first entry point, as the backup mirror, with a different entry point, for that logical volume; and thereafter, upon user issuance of an I/O command, appropriately valid mirror(s) are selected to be read from or written to as a function of which of the two entry points to the same data is specified.


Link to USPTO

IBM Pledge dated 1/11/2005