Did you check the tensing drive and the new drive too 
No, I did check only the drive which was accused by the log to be faulty - HDD2 - and I hope I took the correct drive, at least the Samsung ESTOOL utility found a lot of LBA XXXXXXXXX errors on it.
After getting a new answer by the support to my question - which one is drive HDD2 - after assuming that socket HDD0connects to HDD1 and socket HDD1 hold HDD2 - the answer was - HDD1 was the one put into the system first and drive HDD2 the one put thereafter. As much as I remember, I put both new disks into the cold system and started with both disks to build it up.
Running the full test on a 1,5 TB takes a night on my desktop an another night on the second drive. When the test is running from the CD, the desktop is not available

But apparently that is what I should do. At the moment I am backing up about 325 GB to a disk in my desktop. That will probably also take one night. Th least the PC is available then. The I will take out the new disk, delete the partitions from it. Then I will have the other disk still in the DNS-323 scanned by the inbuilt utility. Maybe then I will check it in the desktop, too.
I wonder why Samsung does not have a utility to run the complete surface test from Windows.