专利名称：Maintaining information of a relationship of
target volumes comprising logical copies ofa source volume
发明人：Michael Thomas Benhase,Wendy Lynn Ward申请号：US12135083申请日：20080606公开号：US08327095B2公开日：20121204
专利附图：
摘要：Provided are a method, system, and article of manufacture for maintaininginformation of a relationship of target volumes comprising logical copies of a source
volume. Information is maintained on a source volume having a plurality of data units anda plurality of target volumes created at different points-in-time maintaining a logicalcopy of the data units in the source volume for the different points-in-time. A sourcedownstream pointer is generated for each data unit in the source volume to point to acorresponding data unit in a first target volume. For each target volume data unit whosedata is maintained in the source volume or another one of the target volumes, a firstupstream pointer is generated indicating one of the source and target volumes fromwhich the target volume data unit inherits data. For each target volume data unit whosedata is maintained in the source volume or another one of the target volumes, generatinga second upstream pointer indicating one of the source and target volumes having thedata for the data unit.
申请人：Michael Thomas Benhase,Wendy Lynn Ward
地址：Tucson AZ US,Tucson AZ US
国籍：US,US
代理机构：Konrad Raynes & Victor LLP
代理人：David W. Victor
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