The present invention provides systems and methods for copying and/or transferring stored data of one storage volume of a storage system to another storage volume while enabling requests to the storage volumes. The systems and methods may be particularly useful in RAID storage systems. One system includes a detector configured for detecting an amount of the stored data copied from the one storage volume to the other storage volume based on a boundary marker of the storage volumes. The boundary marker may indicate an amount of the stored data copied from the one storage volume to the other storage volume. A processor is communicatively connected to the detector for processing requests to the storage volumes according to rules based on the boundary marker. A file generator may generate a log file of the requests. The log file may be stored in the other storage volume thereby minimizing a need for external storage devices.