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Thread: Disk performance

  1. #1
    Mad Overclocker m4a2t0t's Avatar
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    Disk performance

    Take a look at these and tell me whatca think.

    RAID 1+0, 256KB Stripe, Read/Write Caching enabled.


    40GB WD 400JB PATA



    Tyan Thunder K7
    2x Athlon MP 2400
    Adaptec 2410SA
    4x WD2500KS
    1GB Registered ECC DDR
    Windows Server 2003 SP2

    I have the newest mobo BIOS, RAID Card BIOS/Drivers. It seems the only available drivers for the AMD762/768 are the ones that came with windows.

    The burst speed on the RAID array seems very slow to me.

    Thanks for any help
    Matt
    Will Work For FSB

  2. #2
    Second Most EVIL YARDofSTUF's Avatar
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    RAID 10, 256k stripe, not really surprising. Is RAID 5 an option?

  3. #3
    Mad Overclocker m4a2t0t's Avatar
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    I had it setup as RAID 5 with 3 disks and it was worse. I am going to try RAID 5 again with the 4 disks and see how it goes. SHould I go with 256K stripe again? I am mainly storing multimedia files.
    Will Work For FSB

  4. #4
    Second Most EVIL YARDofSTUF's Avatar
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    ive usually gone with 32k or 64k, I did 128k once and it was slower.

    Raid 5 should increase the read times.

  5. #5
    Mad Overclocker m4a2t0t's Avatar
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    Ill try a smaller stripe size. Will post some new benchs whenever the array finishes building.
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  6. #6
    Mad Overclocker m4a2t0t's Avatar
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    4x250GB WD2500KS RAID 5 - 64K Stripe

    Will Work For FSB

  7. #7
    resident plumber Mark's Avatar
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    i'm no expert on this kinda thing, but that seems kinda slow for raid, unless raid-5 is slower than raid-0 ? ?

  8. #8
    Second Most EVIL YARDofSTUF's Avatar
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    Quote Originally Posted by Mark View Post
    i'm no expert on this kinda thing, but that seems kinda slow for raid, unless raid-5 is slower than raid-0 ? ?
    Read times should be on par or better, write times slower, due to the backup ability.


    Something is really sucky there.

  9. #9
    Mad Overclocker m4a2t0t's Avatar
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    Same RAID 5 with 256k Stripe

    Will Work For FSB

  10. #10
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    Your benchmarks are quite slow. My single drive desktop on atto benchmark was 110mb for both read and write.
    Raid 5 is much slower then raid 0. It also has a huge slowdown when a drive fails.

    Raid 0 is not safe, and should never be used on data

    As for raid 10, its generaly faster then raid 1 or raid 5.

    Raid 1 is about as fast as a single drive.

    Using HDtach
    One of my raid 5 servers 6x750gb SATA - gave me 319mb burst, 174 read.

    One of my raid 10 servers 4x146GB SAS raid 10 - gave me 316mb burst, 195 read.

    Raid 1 on that same server 2x146GB SAS raid 1 - gave me 191mb burst, 114 read

    As you can see the raid 10 was faster then the raid 5 ... if it was 6 disks on raid 10 it would have been even faster. the raid 10 server was 15k rpm SAS drives so thats helps alot also.

    I would have posted the pics, but i cant seem to attach em here ... all i can do is link pics and they are not online.
    Last edited by bilbus; 02-04-09 at 10:47 PM.

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