Techniques are provided for performing a copy operation. A fast reverse restore command indicating a new source and a new target is received, wherein the new source is an original target and the new target is an original source. A synchronous scan is performed on the new target. A new target structure...http://www.google.com.tw/patents/US7461100?utm_source=gb-gplus-share專利 US7461100 - Method for fast reverse restore
