Need help with Raid 0

[Aaron670]

So i recently bought 2 250GB Samsung 840 evos for my laptop and i installed them in raid 0 updated all of the drivers and everything is functioning fine except they seem really slow.

 

-----------------------------------------------------------------------

CrystalDiskMark 3.0.3 x64 © 2007-2013 hiyohiyo

                           Crystal Dew World : http://crystalmark.info/

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* MB/s = 1,000,000 byte/s [sATA/300 = 300,000,000 byte/s]

 

           Sequential Read :   563.751 MB/s

          Sequential Write :   487.766 MB/s

         Random Read 512KB :   438.070 MB/s

        Random Write 512KB :   456.658 MB/s

    Random Read 4KB (QD=1) :    25.223 MB/s [  6157.9 IOPS]

   Random Write 4KB (QD=1) :    51.873 MB/s [ 12664.3 IOPS]

   Random Read 4KB (QD=32) :   324.739 MB/s [ 79281.9 IOPS]

  Random Write 4KB (QD=32) :   309.010 MB/s [ 75441.9 IOPS]

 

  Test : 4000 MB [C: 9.2% (42.7/465.7 GB)] (x5)

  Date : 2014/09/25 13:07:30

    OS : Windows 7 Professional SP1 [6.1 Build 7601] (x64)

  

Here i have the crystal disk mark results and based on what ive seen they don't seem to be any faster than a non raid setup.

 

 

Also some additional info I'm running these on an Alienware m17x R3 with 8GB of ram a 580m gpu and a i7-2630QM processor with the latest bios and intel raid driver i could find.

 

If anyone could give me an idea as to what I'm doing wrong it would be greatly appreciated

 

[scaryjam823]

Do you have ACHI mode enabled in the bios?

[dizmo]

Does the laptop have SATA2 or SATA3? I know a lot came with SATA2.

[Jobbe03]

http://www.alienowners.com/showthread.php/1952-Setting-Up-a-RAID-on-most-Alienware-Systems-HOW-TO

[Aaron670]

Is there a way to enable AHCI with RAID because it seemed like i could only choose one or the other and I think there SATA 3 because there both 6Gb connections

[Aaron670]

Oh and to add i read that my current motherboard is a 6 series so it doesn't support raid with trim. Could this be the reason it is slower?

[SkilledRebuilds]

^Nope, people still ignore this and do it, and get great results.

 

Did you test a drive in that laptop on its own first to check speeds per single drive or just throw them both in straight away..?

Could be Sata2 controllers holding you back, or the Sata3 controller is running in Sata2 mode, been reading about ... seems few issues with sata is common.