A method for controlling access to a storage element that forms a portion of a logical storage device includes setting a write-barrier value to a first value upon receiving a request to copy the contents of the logical storage device. Write operations to the storage element are prohibited with the write-barrier...http://www.google.fr/patents/US6230246?utm_source=gb-gplus-shareBrevet US6230246 - Non-intrusive crash consistent copying in distributed storage systems without client cooperation
Non-intrusive crash consistent copying in distributed storage systems ...
