Patent ID: 7669023
Filing Date: 2010-02-23
Classification: G06F,Y02D

Abstract:
1. A storage system comprising: a controller in communication with one or more first storage mediums and one or more second storage mediums; a first volume having storage capacity allocated from said one or more first storage mediums; and a second volume having storage capacity allocated from said one or more second storage mediums, wherein initially said one or more first storage mediums are configured in a powered on condition and said one or more second storage mediums are configured in a powered off condition, wherein write data received by said controller is stored to said first volume, wherein, while said one or more second storage mediums are configured in a powered on condition, a flush process is carried out whereby content of said write data stored in said first volume is compared with content of any existing data stored in said second volume, and wherein when results of the comparison show that the content of said write data does not match the content of said existing data, said write data is stored to said second volume.