2010 Mac Pro--Why is my SSD so slow?

Discussion in 'Mac Pro' started by gusmahler, Apr 17, 2014.

  1. gusmahler macrumors member

    Joined:
    Mar 17, 2011
    #1
    I have a 2010 Mac Pro with a 2.8 GHz processor and 16 GB RAM. Each of the 4 drive bays have a regular hard drive in it. In the optical bay, I have a 120 GB Mercury 6G flash drive.

    I got it because I had been reading so much about how much faster SSD drives are. Imagine my surprise when I don't notice a huge increase in performance from it.

    I finally got Blackmagic disk tester and compared the SSD to one of my hard drives. Here is the hard drive:

    [​IMG]

    Here is the SSD:

    [​IMG]

    Why is the SSD so slow? Isn't it supposed to be many times faster than a hard drive?
     
  2. Jambalaya macrumors 6502a

    Joined:
    Jun 21, 2013
    Location:
    UK
    #2
    I believe you should be seeing 250 or better. EDIT: how did you set it up ?
     
  3. jenzjen macrumors 68000

    Joined:
    Aug 20, 2010
    #3
    Yes, in the optical bay, the SSD should be faster than what you see
     
  4. xcodeSyn macrumors 6502a

    Joined:
    Nov 25, 2012
    #4
    Simply put, Blackmagic test is quite meaningless for Sandforce-based SSDs as explained in this thread.
     
  5. Marty62 macrumors 6502

    Joined:
    Mar 11, 2010
    Location:
    Berlin formerly London
    #5
    Don't forget that you're on SATA II 3gb/s speeds in the cMP

    However, with a Crucial M4 in my standard MP hard disk bay, I get around
    230/250 write/read speeds.

    So, something is not right about your setup !

    M.

    ----------

    Thanks for that - good to know :)

    M.
     
  6. gusmahler thread starter macrumors member

    Joined:
    Mar 17, 2011
    #6
    It's connected to the SATA connector in the optical bay.

    Well, I figured that. I'm just wondering what it is that's wrong. I'm probably just going to repurpose the SDD for my next gaming PC build, so it's not a big deal, just wondering if I missed something obvious.
     
  7. OS6-OSX macrumors 6502a

    OS6-OSX

    Joined:
    Jun 13, 2004
    Location:
    California
    #7
    An older M4 64GB in the optical bay
     

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  8. wetnap macrumors member

    Joined:
    Jun 7, 2008
    #8
  9. Verdenshersker macrumors member

    Joined:
    Oct 17, 2014
    Location:
    Los Angeles, California
    #9
    I get about 260 mb/sek in Read and 120 mb/sek in Write from my Intel X25M 160 GB disc in the hard drive bay.
    That is just a comparison, so hope it can help a bit.
     
  10. iBuildMacs macrumors member

    iBuildMacs

    Joined:
    Dec 29, 2014
    #10
    If your SSD is on a sled or in the optical bay, you are limited by the Mac Pro drive controller which is @ SATA2 3GB/s even if your SSD is 6GB/s.

    You should get a Velocity Solo x2. This will maximize the speed of your SSD to SATA3. Your scores will most likely almost double.
     
  11. flowrider macrumors 601

    flowrider

    Joined:
    Nov 23, 2012
    #11
  12. Pardus macrumors member

    Pardus

    Joined:
    Aug 9, 2006
    Location:
    Vancouver, BC
    #12
    why am i so much faster

    I have an 840 Evo 1gb ssd in a Mac 3,1 using icy dock. I am getting 258MB/s write and 268MB/s read.
     

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