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Have 2 seagate Sata3 6mb/sec drives none any faster on a sata 3 mb from a sata2 system. whats up

I have installed a new Haswell mb Asrock H87 pro4m mb and reformatted one of the older Seagate 1 TB drives 7200.12 rated at 6gb/second ST31000524AS. I have the same experience index by Microsoft rated at 5.9 storage thru put. This was the same with my old mb running sata 2 controller. What gives.
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  1. Best answer
    rshimek said:
    I have installed a new Haswell mb Asrock H87 pro4m mb and reformatted one of the older Seagate 1 TB drives 7200.12 rated at 6gb/second ST31000524AS. I have the same experience index by Microsoft rated at 5.9 storage thru put. This was the same with my old mb running sata 2 controller. What gives.


    A spinning HDD just cannot saturate a SATA II bus much less a SATA III bus. You need an SSD for that.

    Yogi
  2. Thx, the manufactures stated speed sucks and puts it over on the public. Thx for the answer.
  3. rshimek said:
    Thx, the manufactures stated speed sucks and puts it over on the public. Thx for the answer.


    You're quite welcome!

    Yogi
  4. rshimek said:
    Thx, the manufactures stated speed sucks and puts it over on the public. Thx for the answer.

    The manufacturers are actually pretty forthcoming in the speed of their drives. Seagate lists the max sustained transfer rate for their drives between 125-210 MB/s.
    http://www.seagate.com/internal-hard-drives/desktop-hard-drives/desktop-hdd/

    I'm sorry you were fooled into thinking the SATA3 speed was the drive's actual speed. It's just the interface's max theoretical speed. This is just one of those things anybody buying hard drives has to learn. If it makes you feel better, if you're reading something from the drive which is sitting entirely within the 16-64 MB cache, it will be transferred at the full 6 GB/s. It'll finish in 0.01 sec instead of 0.02 sec, but it will have been transferred at 6 GB/s.
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