HCL-Seagate 3TB ST3000DM001: Is newer p/n:1CH166 included?

I have a Readynas NV+ with four 1.5TB Seagate disks. Two of them were already replaced under warranty. Some weeks ago I wanted to upgrade to the latest Radiator version, but when the Readynas tried to reboot I got a system hang. After some tests Netgear support sent me a new chassis. I put the disks in the new chassis, but still no boot. Then I tried pulling disk by disk to see if the system would start (it should with three disks), and when I pulled disk 2 it did. So disk 2 was preventing the system from booting. These 1.5TB disk are no longer available, and the disk could only be replaced by a 2TB version. New Seagate 2TB disks have 4kB sectors, so I decided to replace all disks by new 2TB versions and do a factory reset. That would initialize the disks for proper 4kB layout. However I first wanted to restore the raid configuration, and I put a new 2TB disk in slot 2. After a few days the SATA interface died, and it did so on all four new disks.....

I will return them to the supplier and get new ones, but this time the proper 9YN164 type for use with firmware CC4H.

When I explained the difference between the two ST2000DM001 versions to Netgear support, and also stated that it was not possible to load the recommended CC4H firmware in my disks, then they told me that the disks were not supported because the recommended firmware can not be loaded.