Concurrent Copying
The AdvancedCopy Manager multiple copy function allows concurrent copying from a single source volume to multiple destinations. Only one of these destinations can be in a different ETERNUS.
Cascade Copying
Cascade copying involves specifying the destination of one copy process as the source of a subsequent copy. One copy might be used as a nearby operational backup and another as a remote copy for disaster recovery or archive.
Possible copy combinations for cascade copy are:
A copy made with OPC used as the source for REC
A copy made with EC used as the source for REC
A copy made with REC used as the source for OPC
A copy made with REC used as the source for SnapOPC
A copy made with REC used as the source for EC
