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    vertex 3 on sata 2

    Discussion in 'Alienware M11x' started by LockOn, Jun 29, 2011.

  1. LockOn

    LockOn Notebook Consultant

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    just picked up the vertex 3 and ran the crystaldiskmark bench and got low results
    this is in achi and a fresh install
    any idea on why the speeds are so slow should be around 280 read and 260 write
    bench1.PNG
     
    LockOn, Jun 29, 2011
    #1
  2. bigun08

    bigun08 Notebook Consultant

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    I don't think I have ever seen the full advertised speeds on any drive I have ever tested.. heck there was a post a few days back where I tested a Seagate XT against my samsung SSD and this other guy posted numbers like yours using a R3 and a SATA III SSD and his numbers were no where near the 400 read speeds advertised.. Like with most advertising those numbers are an absolute maximum set in perfect conditions..
     
    bigun08, Jun 29, 2011
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  3. cyrus282

    cyrus282 Notebook Enthusiast

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    Hi LockOn,

    for a R2 that's normal. You wont get SATA 3 out of a SATA 2 interface. For a comparison see the attachment. These are my scores on an R2 with a RealSSD C300 256GB SSD. Nowhere near the advertised read:355MB/s and write:215MB/s speed in SATA3 mode. But for SATA2 these scores are good enough.
     

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    cyrus282, Jun 30, 2011
    #3
  4. namaiki

    namaiki "basically rocks" Super Moderator

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    Which SATA drivers are you guys using? (generally: msahci or iastor)
     
    namaiki, Jun 30, 2011
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  5. LockOn

    LockOn Notebook Consultant

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    I know I wont get sata 3 speeds all I am trying to do is get closer to the sata 2 advertised speeds read is down by 60 and write almost 100

    as for the driver im not quite sure where to find it looking in device manager i only found intel so i dont know
     
    LockOn, Jun 30, 2011
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  6. cyrus282

    cyrus282 Notebook Enthusiast

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    I'm using the msahci
    with the crappy iaStor, i only get half the speed in 4k write and read.
     
    cyrus282, Jun 30, 2011
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  7. cyrus282

    cyrus282 Notebook Enthusiast

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    LockOn, you can see what driver is enabled in the app AS SSD Benchmark (attachmet). There you can also see if your Alignment i proper (should see an "OK"). if the alignment is BAD then you probably made a mistake while installing your OS.
    To change the used driver google will help you ;)
     

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    cyrus282, Jun 30, 2011
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  8. LockOn

    LockOn Notebook Consultant

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    was using the iaStor
    then switched to msahci and saw very little difference vertex compare.PNG
     
    LockOn, Jun 30, 2011
    #8