Raid 2x M4 512GB

Discussion in 'MacBook Pro' started by cookiesnfooty, Jul 7, 2012.

  1. cookiesnfooty, Jul 7, 2012
    Last edited: Jul 7, 2012

    cookiesnfooty macrumors 6502

    cookiesnfooty

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    #1
    Does anyone know the speeds you would get by doing Raid 0 on these drives as I currently have one in the Macbook pro and i'm about to receive another?

    Idea is to have 2x 512GB SSD raid
     
  2. yusukeaoki macrumors 68030

    yusukeaoki

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    Mar 22, 2011
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    Tokyo, Japan
    #2
    430MB/s Read
    270MB/s Write

    Thats what we got on my friends MBP.
     
  3. cookiesnfooty thread starter macrumors 6502

    cookiesnfooty

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    #3
    I get 506MB/s read with just one SSD?
     
  4. yusukeaoki macrumors 68030

    yusukeaoki

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    #4
    Oops, sorry not 430, 530MB/s.
    Well around, it was 525~30MB/s for read.
     
  5. Dangerous Theory, Jul 7, 2012
    Last edited: Jul 7, 2012

    Dangerous Theory macrumors 68000

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    #5
    Assuming you do really mean raid0 and not raid1 then you're looking at roughly the normal performance of the drive.

    Edit, I meant roughly double. Raid 1 is roughly the normal performance.
     
  6. cookiesnfooty thread starter macrumors 6502

    cookiesnfooty

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    #6
    So you can't double the speed.
     
  7. darkmaxdevil macrumors member

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    Tokyo, Japan
    #7
  8. maflynn Moderator

    maflynn

    Staff Member

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    #8
    No, RAID-0 really improves the performance for hard drives because it reduces the latency, since there's two drives but with SSD there is no latency
     
  9. DrJohnZoidberg macrumors member

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    Mar 16, 2012
    #9
    Somewhere between 900MBps and 1000MBps, if you have a MBP that can run both drives at full SATA III speeds (2012 cMBP for example) [link].

    However, some MBPs have problems running the ODD bay at full SATA III speeds.
     
  10. Puevlo macrumors 6502a

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    Oct 21, 2011
    #10
    Nobody needs speeds that fast. Find a way to make your programs more efficient rather than throw raw gigahertz at it.
     
  11. throttlemeister macrumors 6502a

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    Netherlands
    #11
    I think you both need to get your raid levels straightened out...
     
  12. Dangerous Theory macrumors 68000

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    Jul 28, 2011
    Location:
    UK
    #12
    I made an error in my post. You will in effect (almost) double your speeds.

    You're right. I was thinking about raid 1 and writing about raid 0 haha.
     
  13. jcpb macrumors 6502a

    Joined:
    Jun 5, 2012
    #13
    Someone will find a use for such fast speeds e.g. copying 1GB folders in ~4 seconds with ~5 year old SSD tech.

    http://www.nextlevelhardware.com/storage/battleship/
     
  14. Fatt, Jul 7, 2012
    Last edited: Jul 7, 2012

    Fatt macrumors member

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    Jul 2, 2012
    Location:
    Miami/Gainesville, FL
    #14
    Lots of inconsistent info in this thread...

    RAID0 will theoretically double your reads and writes, with absolutely no data redundancy and increased risk of data loss. If you lose one drive, your very likely to lose ALL your data. RAID0 will also double your storage capacity, so two 512GBs in RAID0 will give you a whooping 1TB capacity. RAID0 isn't even technically a true RAID, as RAID stands for a redundant array of inexpensive drives, and RAID0 offers no redundancy, only performance. (Hence the 0)

    RAID1 will provide you with data redundancy, while maintaining only 512GB across both drives. Write speeds will be the same, possibly even slower than with one drive. However read speeds from a RAID1 can offer some increased performance, as you have two drives available to queue. This really is more significant with mechanical HDDs though, and does not offer you anywhere near the performance of a RAID0. However you will have data redundancy.
     

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