RAID Converter and Methods for Transforming a First RAID Array to a Second RAID Array Without Creating a Backup Copy

摘要

A system transforms data structures absent the need for a backup copy. The system transforms a first logical store in an initial logical arrangement to a desired logical arrangement where the data structures of the logical arrangements are different. The system uses a select sequence of data operations that moves data from its origin in the initial logical arrangement to a target location in the desired logical arrangement. The system generates and properly locates parity information when so desired. The system executes a subsequent data operation in accordance with an indication that the previous data operation was successful. Each subsequent data operation uses the source location from the previous data operation. A non-volatile memory element holds information concerning a present data operation to enable a rollback operation when a present data operation is unsuccessful.