Originally Posted by Wilky13
Maximum PC tested the new 5900rpm Seagate Barracuda 4TB and they were just as fast as the 7200rpm 3TB models because they use 1TB platters instead of 750MB platters.
I have seen a bunch of reviews at various sites and I own both so I am fully away of the differences.
There is some small aspects that get overlooked- 7200rpm is vastly superior in seek times, random IOPS and just general stuff as compared to rather simplistic sequential reads and writes (all in a row).
I would not go as far as saying what you said
I think you are wrong.
It would be better said: The new Seagate 4TB drives are 5900rpm, and 1TB platters and hold a serious advantage over the traditional 5400rpm drives and are a much better blend of spindle speed, performance compromise
If your the type to naturally go for a 5400rpm drive it's probably better to go with a 5900rpm seagate because they use even less power than a WD RED or GREEN, and are much faster, and also cost less.
But the 3TB 7200rpm (and 2TB and 1TB 7200.14's) are operating in a performance territory that a 5900RPM 4TB can't go. 200MB/sec + speeds on the faster parts of the spindle, and average speeds a good deal higher than 4TB drives, not to mention superior in the random stuff and seek times that the faster 7200rpm spin allows for. I own and use both and there is a small difference that might not be that important to many in a simple server environments- but nonetheless there is still a difference.
My general findings are that while benchmarks are often a good measuring stick, the ideal results from the benchmark very rarely translate into real world performance. So if your seeing 160MB/sec speeds in a new drive on a fresh bench- your probably not going to see that consistently in the real world. That's my objection with 5400rpm- is that when they slow down and fill up in the real world they become slow dogs. I don't actually need the 200MB/sec speed of a 3TB Seagate 7200rpm drive, but what I appreciate is that in the worst possible case scenario it remains faster than my LAN and doesn't create a bottle neck. Do to this- you must only remain above 125MB/sec worst case scenario.
I have yet to find any drives that can do this as well for the same cost per TB as the 3TB Seagate 7200.14- and that's why I use them. If something can do it as well, and it is cheaper I would switch. The 4TB is close, but no cigar. Almost only counts in horseshoes or grenades.
That thread had tons of comparisons and info on both ^