I have a couple of question of Compellent features:

1. Are multiple snapshots cascaded - i.e if I take snapshot 1 at 1pm and then write at block A and then take snapshot 2 at 2pm and write at block B is there a COW operation to copy the "old" contents of block B into both snapshot 1 AND snapshot 2 or just snapshot1 (so that snapshot 1 only contain COW block from 1pm to 2pm and snapshot 2 contains COW block from 2pm onwards)
   
   
2. If I take a snapshot and then create a volume from this snapshot and then migrate this volume (Local Copy > Migrate Volume) to a new volume, then is dedup used so that initially not much space is used or is dedup not used for this operation - I am guessing not, but I just thought I would check