02-28-2020, 03:37 PM 
		
	
	
		Hi.  Thanks for your site and videos.  I have recently moved my 4tb wd red HDD from ds412+ to rs1219+.  A check today on the synology site shows 4tb red HDD are no longer listed as compatible.  They were on the compatible list yesterday I’m sure!  My question is which models/serial numbers were compatible?  Has WD published when they changed from CMR to SMR on hdd so we can check what we have?
Regards
	
	
	
	
Regards

 
 

 
