An asynchronous data redundancy technique. A primary copy of data is held at a primary storage facility, while data that is redundant of the primary copy is held at a secondary storage facility. To inhibit propagation of errors from the primary copy to the redundant data, write transactions to the redundant...http://www.google.de/patents/US20040250029?utm_source=gb-gplus-sharePatent US20040250029 - Asynchronous data redundancy technique
