Patent ID: 6212531
Filing Date: 2001-04-03
Classification: G06F,Y10S

Abstract:
A computer-implemented method of performing a backup of source data, comprising:(a) identifying source data tracks on a source volume, wherein the source volume comprises pointers to the source data tracks in a storage device;(b) performing a snapshot from the source volume to a work volume to copy the source data from the source volume to the work volume, wherein following the snapshot the work volume includes a copy of the pointers in the source volume to the source data tracks in the storage device;(c) performing a point-in-time backup copy of the source data tracks from the snapshot copy of the source data in the work volume; and(d) during the point-in-time backup, writing updates to the source volume tracks to storage tracks that are different from the source data tracks to which the work volume points, wherein after the update the source volume points to the source data tracks including the updates to the source data.