Fusion drive questions

Discussion in 'iMac' started by memo06dic, Oct 18, 2015.

  1. memo06dic macrumors newbie

    Jul 26, 2005
    The new 2TB fusion drive is 128GB PCIe SSD and 2TB 3.5" 7200RPM right?

    If I make a bootable flash drive, is it possible to reformat the 2 drives as separate volumes so I can manually use them as needed?

    If this is possible, is this 'fusion' SSD the same speed as a BTO 256GB, 512GB or 1TB SSD?
  2. kevo0822 macrumors 6502

    Jul 13, 2007
    New England
    It's actually a 5400RPM drive... which is ridiculous in my opinion.
  3. Winfield macrumors newbie


    Aug 17, 2015
    1. Yes, it is.
    2. Yes, you can.
    3. No. The r/w speed of SSD both are about 1600~1800 MB/s, the SSD part of the Fusion Drive can achieve the same read speed, but the write speed is just half of it.
  4. AlexisV macrumors 68000


    Mar 12, 2007
    Manchester, UK
    Only in the 21.5"?
  5. Bart H macrumors member

    Bart H

    Nov 25, 2012
    Central Virginia
    The fusion drive has 128GB of solid state flash for the most used apps.
  6. G.McGilli macrumors regular

    Oct 19, 2015
    7200rpm if you order a 27" - it's on their specs page.
  7. G.McGilli macrumors regular

    Oct 19, 2015

    I was just reading a site - somewhere i landed on a Google search - saying that yes you can do what you are asking - however if you ever reinstall OS X again - it would join them back together. That's what I read. It was on... I think Anandtech - Fusion Drive review on their site somewhere.
  8. kevo0822 macrumors 6502

    Jul 13, 2007
    New England
    Oh yeah, sorry I just assumed you were referring to the 21.5" because that's what I have. My mistake! The 21.5" Fusion drive is paired with a 5400rpm drive... it seems the 27" pairs with a 7200rpm drive though.
  9. roadkill401 macrumors 6502


    Jan 11, 2015
    Actually it doesn't say at all. The 7200rpm drive is just listed for the drive only on the lowest model. The Fusions drives do not have any speed specs on them at all. You can assume that they are 7200 rpm but Apple actually does not say what they are
  10. Brookzy macrumors 601


    May 30, 2010
    You're right, it doesn't say it anywhere, but the 3TB Fusion Drive in my Late 2015 5K uses a 7,200 RPM drive.

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