A method for creating a point-in-time copy of a data store. A command to create a point-in-time copy of an original data store is received. The processing of input/output operations to the original data store is suspended. A metadata structure of a copy data store is created. The metadata structure contains...http://www.google.com.au/patents/US20040078533?utm_source=gb-gplus-sharePatent US20040078533 - Low overhead snapshot in a storage array using a tree-of-slabs metadata
