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It's RAID0 configuration effective for SDD Drives ?

Discussion in 'Dell Latitude, Vostro, and Precision' started by brosen, Mar 5, 2009.

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  1. brosen

    brosen Guest

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    I've noticed the improvements are relevant but not as big as I expected, I think with normal HD the RAID0 performance will be much better than a single HD drive, any experience using SSD in RAID0 configuration ?, thanks
     
  2. asalcedo

    asalcedo Notebook Consultant

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    Yes, there is a clear improvement. I have two Intel X25-M on Raid0 in my M6400 and I get 460MB/s read and 165MB/s write according to ATTO Benchmark. That is about twice the rated speeds of the single drives.

    Important, the stripe size that I am using is 64kB, not the default 128kB shown by the Intel controller
     
  3. brosen

    brosen Guest

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    Why are you using 64KB ?, it's better ?, I have 2 Samsung High Performance 256GB SSD, thanks
     
  4. Commander Wolf

    Commander Wolf can i haz broadwell?

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    In theory you should get perfect scaling with solid state drives in RAID 0. In practice, it's pretty close. If you're worried about raw throughput, you could certainly say it's "effective". The problem is that RAID 0 doesn't really do much for IOPS or random writes, which tend to be the Achilles' Heel of most solid state drives. Although RAID is supposed to ameliorate some of the stuttering found on simple JMicron drives.
     
  5. brosen

    brosen Guest

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    These are the results I am getting with RAID 0 and 128KB, do you think they are ok ?
     

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  6. Commander Wolf

    Commander Wolf can i haz broadwell?

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    They look normal for two of the new Samsungs in RAID 0. I wouldn't really expect much more or less in sequential reads. I like that negative CPU usage :D
     
  7. asalcedo

    asalcedo Notebook Consultant

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    Yes, SSDs perform better with a smaller stripe size. 64 being the optimal for Intel X25-M SSDs.

    For other drives it may be 32KB, but never 128KB

    That is the conclusion from an article that tried different sizes. I think it is a NoteBookReview.com article
     
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