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  1. #1
    Join Date
    Aug 2005
    Posts
    334

    * Can you Compare/comments my HD speeds

    I got the following server with Hivelocity:

    Xeon E3-1230
    8Gb of ram
    2x 500gb SAS 7200rpm
    Raid 1 (hardware)

    My load is not much : Average: 0.20

    I did the following HD test:

    "hdparm -tT /dev/sda"

    with the following results:

    Code:
    /dev/sda:
     Timing cached reads:   26650 MB in  2.00 seconds = 13346.95 MB/sec
     Timing buffered disk reads:  430 MB in  3.01 seconds = 143.06 MB/sec
    and I also did this test:

    "dd if=/dev/zero of=output.img bs=8k count=256k"

    With the following results:

    Code:
    262144+0 records in
    262144+0 records out
    2147483648 bytes (2.1 GB) copied, 33.4878 s, 64.1 MB/s
    Comparing some of these results on this forum, I tougth it was slow, especially for the second test.

    Am i wrong, are those test results average ?

    Thanks, Id appreciate you comment or even comprae your results.

  2. #2
    Join Date
    Jun 2011
    Location
    Internet
    Posts
    2,985
    For RAID1 that's almost normal. If you want insane speeds, you should get hardware RAID10.

    dd isn't a very accurate disk benchmarking tool though (Try an actual benchmarking tool)
    Last edited by Afterburst-Jack; 03-01-2012 at 03:11 PM.

  3. #3
    Join Date
    Jun 2011
    Location
    Canada
    Posts
    38
    Is there any way that we know HDD's RPM too?
    and why you expect that RAID1 be slow?!

  4. #4
    Join Date
    Jun 2011
    Location
    Internet
    Posts
    2,985
    Quote Originally Posted by saeedb2000 View Post
    Is there any way that we know HDD's RPM too?
    and why you expect that RAID1 be slow?!
    RAID1 has faster read speeds than write speeds, and DD is a write test. RAID10 is overall much faster than RAID1 on both read and write.

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