Remote copy method and remote copy system
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United States of America Patent
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Jul 31, 2012
Grant Date -
Aug 5, 2010
app pub date -
Sep 30, 2009
filing date -
Jun 27, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A remote copy system includes: a first storage system having a first logical volume accompanied with a first plurality of disk drives in the first storage system; a second storage system having a second logical volume, which is a virtual volume not accompanied with a second plurality of disk drives in the second storage system, the virtual volume configuring a first remote copy pair with the first logical volume; and a third storage system having a third logical volume accompanied with a third plurality of disk drives in the third storage system, the third logical volume configuring a second remote copy pair with the virtual volume and storing a copied data of data stored in the first logical volume. If the second storage system receives write data sent from the first storage system to the virtual volume, the second storage system transfers the write data to the third logical volume in the third storage system.
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