Slow raid 0

Discussion in 'Mac mini' started by Scatology, Aug 6, 2013.

  1. Scatology macrumors newbie

    Jul 19, 2013
    Hi all!

    I received my mac mini two days ago and I installed 2 same exact SSDs with the OWC kit. These are Adata sx900 128gb SSDs. I made a raid 0 volume with 32kb stripe-unit. The read speed is +/- 800 mb/s but the problem is the write speed. I only got +/- 320 mb/s...

    Is anyone have an idea why I got these poor write performance?


    Attached Files:

  2. opinio macrumors 65816

    Mar 23, 2013
    Specs show:

    128GB Performance (ATTO) :
    Read: Up to 555MB/S
    Write: Up to 530MB/S
    Multimedia Data Transfer (AS-SSD)
    Read : Up to 470MB/S
    Write : Up to 180MB/S
    MAX 4K write IOPS up to 90K

    I'm not an expert on what atto or as-SSD is but the latter suggests your speeds could be correct as read is 470 and write is 180. That would give you about those speeds you show in a RAID-0 config.

    128gb SSDs are often slower than larger SSDs.
  3. Darby67 macrumors 6502

    Jul 5, 2011
    the corner of Fire and Brimstone
    I would conclude the same as opinio that what what you are seeing as results are what they post as the tech specs.

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