Patent ID: 8271757
Filing Date: 2012-09-18
Classification: G06F

Abstract:
1. A method for re-striping data between logical drives in a data storage container, the method comprising: partitioning the logical drives into a plurality of tiers where the logical drives within a common tier comprise a similar performance characteristic; storing a plurality of data placement maps that each define a stripe pattern for storing data in accordance with a number of logical drives; adding a new logical drive to the data storage container; determining a performance characteristic of the new logical drive; determining a tier of the plurality of tiers for the new logical drive based on the determined performance characteristic; determining to re-stripe data between the logical drives within the determined tier in response to the addition of the new logical drive; selecting which data to re-stripe between the logical drives within the determined tier in accordance with a data placement map from the plurality of data placement maps that corresponds to a new number of logical drives that includes the new logical drive; and imposing a preferred time ordering on the data selected to be re-striped.