Abstract: A system and method for fixing data inconsistency between an original dataset stored on a source storage server and a mirror of the original dataset stored on a destination storage server is provided. The method determines whether the mirror is consistent with the original dataset by comparing metadata describing the original dataset with metadata describing the mirror. If the mirror is inconsistent with the original dataset, corresponding block(s) of the original dataset is/are requested and received from the source storage server. The mirror is then fixed according to the received block(s).

Abstract: A method and system for secure and reliable event data logging are disclosed. In accordance with an embodiment of the invention, event data is generated for events relating to backup, or archiving, operations. The event data is appended to the log file. However, during the operation to append the event data to the log file, the appending operation is monitored to determine whether the event logging operation is successful. If the event logging operation is unsuccessful, the event data is retained in memory until the event data can be successfully appended to the log file.

Abstract: A system and method for providing soft locks so applications can communicate their dependence upon PCPIs for a plurality of storage systems and applications. The soft locks, created and maintained by an application executing on one or more of the storage appliances, identify certain PCPIs that are to be retained by a storage appliance and its applications. An illustrative embodiment of this system and method is to use these soft locks to ensure that storage volume destinations along the cascaded chain of applications running on that or other storage systems retain the appropriate PCPI and state.