Patent ID: 7296180
Filing Date: 2007-11-13
Classification: G06F,Y10S

Abstract:
1. A method for recovering data on a data storage system, said data storage system including one or more nodes, each of said one or more nodes including one or more data storage structures, said method comprising: determining at least one layout map ID that identifies a layout map which places at least one data object fragment of a data object on a data storage structure of a node; determining an object ID associated with said at least one layout map ID, said object ID identifying said data object; determining said at least one data object fragment associated with said object ID as placed on said data storage structure of said node based on a layout derived from said layout map and a current disk mask; determining whether said at least one data object fragment is present on said data storage structure of said node; and, upon a determination that said at least one data object fragment is not present on said data storage structure of said node, reconstructing said at least one data object fragment on said data storage system.