I started looking the other day at SAS 4Kn drives for servers. I was told they are the latest and greatest and sooner or later everything will be 4Kn. The first thing I noticed was a lack of stock. I figured it might be because 4Kn drives were just too new. Then I found an article back in Jan of 2014 saying they were rare because they were so new. So here we are over 3 years later (almost 4) and they still don't appear to be main stream at least if you base it on stock.
Then you look at Seagate. They make a SED-FIPS and a SED model. HGST makes an ISE, SE, BDE and TCG FIPS model. That begs the question "is there a standard"?
So between the lack of stock and the different manufactures having different versions I have to ask if it is really a sound idea going to 4Kn? Why the lack of stock and different versions?