Samsung SSD Magician DC 33
Notes on Write Same command
During the execution of SCT Write Same Foreground feature it is not possible to issue any other command to the device, and it cannot be stopped.
SCT Write Same Background is an interruptible ATA command. Magician application does not return immediately and the last LBA written is updated until the execution completes. User can stop the execution by providing interrupt using control + C key.
Also note that if any other command such as Identify Device is issued to the device by any other tool, SCT Write Same Background command stops.