Patent ID: 7171518
Filing Date: 2007-01-30
Classification: G06F

Abstract:
1. A method for temporarily placing a data storage unit in an off-line condition within a redundant data storage system having a plurality of data storage units disposed in at least one logical volume in an on-line condition, which comprises the steps of: placing a selected data storage unit in an off-line condition for a purpose unrelated to a failure thereof for a period of time; automatically storing data directed to the logical volume in which the selected data storage unit is disposed in a logging repository disposed outside of the logical volume in which the selected data storage unit is disposed during the period of time; detecting a failure in a data storage unit other than the selected data storage unit in the logical volume in which the selected data storage unit is disposed; placing the selected data storage unit in an on-line condition following the period of time; downloading data stored in the logging repository onto the selected data storage unit; allowing data directed to the logical volume in which the selected data storage unit is disposed to be stored in the logical volume in which the selected data storage unit is disposed; and updating redundant data within the logical volume in which the selected data storage unit is disposed.