Patent ID: 8127182
Filing Date: 2012-02-28
Classification: G06F

Abstract:
1. A method of improving storage reliability, comprising: receiving an indicator of an impending failure of a first storage device in a RAID group; in response to said indicator, ceasing writing data to said first storage device while said first storage device is still operational; in response to said indicator, writing, to a nonvolatile solid state memory device, a first block of data directed to be written on said first storage device after writing data to said first storage device is ceased; in response to said indicator, copying data stored on said first storage device to a second storage device after writing data to said first storage device is ceased; in response to said indicator, copying said first block of data from said nonvolatile solid state memory device to said second storage device; after said copying data stored on said first device to said second storage device and said copying said first block of data from said nonvolatile solid state memory device to said second storage device completes, operating said RAID group with said second storage device functioning in place of said first storage device; and, reading data from said second storage device.