Patent ID: 8918607
Filing Date: 2014-12-23
Classification: G06F

Abstract:
1. A computer program product for archiving data in a storage system utilizing a RAID-5 configuration, the computer program product comprising a non-transitory computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising: computer readable program code configured to make a first flash copy of data in a first storage volume while the source volume is off-line, wherein the first flash copy comprises a stride of data including one or more tracks of data and the data includes a previous parity; computer readable program code configured to compress the stride of data, wherein the full stride of data is compressed such that each track of data is compressed into a set of compressed data pages; computer readable program code configured to destage the compressed full stride of data; computer readable program code configured to compute a new parity from the compressed full stride of data without using the data and the previous parity; computer readable program code configured to store the set of compressed data pages in a second storage volume; and computer readable program code configured to uncompress archived data in the second storage volume including: