How to ensure ssd is performing correctly?

Discussion in 'Mac Pro' started by sparkie1984, Sep 26, 2010.

  1. sparkie1984 macrumors 68000

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    #1
    how do you fellow applers check its performing well? i ran xbench and my highest speed was on a sequential uncached read at 180.81 MB/sec (256k blocks)

    is that about right? i thought these ran around the 200 mark?

    my lowest mark was for another uncached read and came in at 29.85MB/sec (4k blocks)

    sorry if this seems stupid, but im new to the world of ssd's and want to check its performing as it should be!
     
  2. Hellhammer Moderator

    Hellhammer

    Staff Member

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    #2
    Hard to say because you didn't tell what SSD you have. Some have only 200MB/s speeds while others can have nearly 300MB/s
     
  3. sparkie1984 thread starter macrumors 68000

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    #3
    Oops sorry :eek:

    It's an ocz vertex 2 there were other results mostly along the 100mb/sec
     
  4. strausd macrumors 68030

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    #4
    I thought those were supposed to get up around 280, same as OWC SSDs. I just tested my OWC SSD and only got 240 for read and write.
     
  5. sparkie1984 thread starter macrumors 68000

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    #5
    this is whats concerning me!

    i know its relative but people describe the performance as wow!

    and im not experiencing that here. its better but not by tons
     
  6. johnnymg macrumors 65816

    johnnymg

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    #6
    What size SSD did you get? Often, the smaller SSD's are a bit slower than their big brothers.

    cheers
    JohnG
     
  7. sparkie1984 thread starter macrumors 68000

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    #7
    its a 60gb ocz vertex 2 which im sure said on the box 220/250mb/sec.

    its a shame there not a diagnostic or something which tests it.

    its also runing the latest firmware which came out in july or august this year i think
     
  8. johnnymg macrumors 65816

    johnnymg

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    #8
    JMO, but that's a "smaller" SSD so perhaps the speed #'s you're seeing are normal.
     
  9. Sean Dempsey macrumors 68000

    Sean Dempsey

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    Aug 7, 2006
    #9
    Here's the results on my 60gb OWC SSD:

    Sequential Uncached Read of 256k blocks: 197.33 MB
     

    Attached Files:

  10. Sean Dempsey macrumors 68000

    Sean Dempsey

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    #10
    And to compare, here's a VelociRaptor 150gb
     

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  11. sparkie1984 thread starter macrumors 68000

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    #11
    Thanks Sean!

    That looks almost identical to what mine did :)

    I thought they'd be a little faster but I guess the figures are up to rather than sustained
     
  12. Honumaui macrumors 6502a

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  13. sparkie1984 thread starter macrumors 68000

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  14. pinchu71 macrumors newbie

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    Dec 3, 2008
    #14
    here my results with two 120 Gb SSD from OWC in raid 0 mode
    [​IMG]
     
  15. SpookyLars macrumors 6502

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    Poland
    #15
    Software :D Take a look here.
     
  16. sparkie1984 thread starter macrumors 68000

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  17. MysticColby macrumors newbie

    MysticColby

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    Santa Cruz
    #17
    OCZ Vertex 2 240GB vs. WD Caviar Black 1TB (stock Mac Pro HD)
    specs from OCZ:
    Max Read 285MB/s
    Max Write 275MB/s
    Sustained Write 250MB/s
    not quite there...

    I like those raid0 speeds!
     

    Attached Files:

  18. DSchwartz88 macrumors 6502

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    May 18, 2006
    #18
    I would take other peoples advice here and use Aja System Test. xBench has time and time again proven to be an unreliable source for SSD benchmarks (bunch of threads on it if you search)
     
  19. sparkie1984 thread starter macrumors 68000

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    #19
    thanks!

    well i ran it and:

    I/O Transactions
    Frame MB/sec
    Read Write
    00.0 262.3 251.0
    01.0 262.9 250.1
    02.0 261.5 252.6
    03.0 261.3 256.7
    04.0 264.7 256.6
    05.0 251.0 257.1
    06.0 253.0 256.6
    07.0 236.6 256.6
    08.0 263.7 249.3


    this is only a fraction of the text it said but its all quite close.

    seems to be a bit healthier!
     

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